1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
28 This variable is by default set to '/afs'. In the unlikely case
29 this is not the correct root, it is possible to override this with
30 a hint value or command line option. This will be used in subsequent
31 tests for AFSness in the Perl configure and test process.
33 alignbytes (alignbytes.U):
34 This variable holds the number of bytes required to align a
35 double-- or a long double when applicable. Usual values are
36 2, 4 and 8. The default is eight, for safety.
38 ansi2knr (ansi2knr.U):
39 This variable is set if the user needs to run ansi2knr.
40 Currently, this is not supported, so we just abort.
42 aphostname (d_gethname.U):
43 This variable contains the command which can be used to compute the
44 host name. The command is fully qualified by its absolute path, to make
45 it safe when used by a process with super-user privileges.
47 api_revision (patchlevel.U):
48 The three variables, api_revision, api_version, and
49 api_subversion, specify the version of the oldest perl binary
50 compatible with the present perl. In a full version string
51 such as '5.6.1', api_revision is the '5'.
52 Prior to 5.5.640, the format was a floating point number,
54 perl.c:incpush() and lib/lib.pm will automatically search in
55 $sitelib/.. for older directories back to the limit specified
56 by these api_ variables. This is only useful if you have a
57 perl library directory tree structured like the default one.
58 See INSTALL for how this works. The versioned site_perl
59 directory was introduced in 5.005, so that is the lowest
60 possible value. The version list appropriate for the current
61 system is determined in inc_version_list.U.
62 XXX To do: Since compatibility can depend on compile time
63 options (such as bincompat, longlong, etc.) it should
64 (perhaps) be set by Configure, but currently it isn't.
65 Currently, we read a hard-wired value from patchlevel.h.
66 Perhaps what we ought to do is take the hard-wired value from
67 patchlevel.h but then modify it if the current Configure
68 options warrant. patchlevel.h then would use an #ifdef guard.
70 api_subversion (patchlevel.U):
71 The three variables, api_revision, api_version, and
72 api_subversion, specify the version of the oldest perl binary
73 compatible with the present perl. In a full version string
74 such as '5.6.1', api_subversion is the '1'. See api_revision for
77 api_version (patchlevel.U):
78 The three variables, api_revision, api_version, and
79 api_subversion, specify the version of the oldest perl binary
80 compatible with the present perl. In a full version string
81 such as '5.6.1', api_version is the '6'. See api_revision for
82 full details. As a special case, 5.5.0 is rendered in the
83 old-style as 5.005. (In the 5.005_0x maintenance series,
84 this was the only versioned directory in $sitelib.)
86 api_versionstring (patchlevel.U):
87 This variable combines api_revision, api_version, and
88 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
89 for use as a directory name. This is filesystem dependent.
92 This variable is used internally by Configure to determine the
93 full pathname (if any) of the ar program. After Configure runs,
94 the value is reset to a plain "ar" and is not useful.
97 This variable holds the name of the directory in which the user wants
98 to put architecture-dependent public library files for $package.
99 It is most often a local directory such as /usr/local/lib.
100 Programs using this variable must be prepared to deal
101 with filename expansion.
103 archlibexp (archlib.U):
104 This variable is the same as the archlib variable, but is
105 filename expanded at configuration time, for convenient use.
107 archname64 (use64bits.U):
108 This variable is used for the 64-bitness part of $archname.
110 archname (archname.U):
111 This variable is a short name to characterize the current
112 architecture. It is used mainly to construct the default archlib.
115 This variable defines any additional objects that must be linked
116 in with the program on this architecture. On unix, it is usually
117 empty. It is typically used to include emulations of unix calls
118 or other facilities. For perl on OS/2, for example, this would
122 This variable is used internally by Configure to determine the
123 full pathname (if any) of the awk program. After Configure runs,
124 the value is reset to a plain "awk" and is not useful.
127 The base revision level of this package, from the .package file.
130 This variable is defined but not used by Configure.
131 The value is a plain '' and is not useful.
134 This variable holds the name of the directory in which the user wants
135 to put publicly executable images for the package in question. It
136 is most often a local directory such as /usr/local/bin. Programs using
137 this variable must be prepared to deal with ~name substitution.
139 bincompat5005 (bincompat5005.U):
140 This variable contains y if this version of Perl should be
141 binary-compatible with Perl 5.005.
144 This is the same as the bin variable, but is filename expanded at
145 configuration time, for use in your makefiles.
148 This variable is used internally by Configure to determine the
149 full pathname (if any) of the bison program. After Configure runs,
150 the value is reset to a plain "bison" and is not useful.
153 This variable is used internally by Configure to determine the
154 full pathname (if any) of the byacc program. After Configure runs,
155 the value is reset to a plain "byacc" and is not useful.
157 byteorder (byteorder.U):
158 This variable holds the byte order. In the following, larger digits
159 indicate more significance. The variable byteorder is either 4321
160 on a big-endian machine, or 1234 on a little-endian, or 87654321
161 on a Cray ... or 3412 with weird order !
164 This variable contains the \c string if that is what causes the echo
165 command to suppress newline. Otherwise it is null. Correct usage is
166 $echo $n "prompt for a question: $c".
168 castflags (d_castneg.U):
169 This variable contains a flag that precise difficulties the
170 compiler has casting odd floating values to unsigned long:
172 1 = couldn't cast < 0
173 2 = couldn't cast >= 0x80000000
174 4 = couldn't cast in argument expression list
177 This variable is used internally by Configure to determine the
178 full pathname (if any) of the cat program. After Configure runs,
179 the value is reset to a plain "cat" and is not useful.
182 This variable holds the name of a command to execute a C compiler which
183 can resolve multiple global references that happen to have the same
184 name. Usual values are 'cc' and 'gcc'.
185 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
187 cccdlflags (dlsrc.U):
188 This variable contains any special flags that might need to be
189 passed with 'cc -c' to compile modules to be used to create a shared
190 library that will be used for dynamic loading. For hpux, this
191 should be +z. It is up to the makefile to use it.
194 This variable contains any special flags that might need to be
195 passed to cc to link with a shared library for dynamic loading.
196 It is up to the makefile to use it. For sunos 4.1, it should
200 This variable contains any additional C compiler flags desired by
201 the user. It is up to the Makefile to use this.
203 ccflags_uselargefiles (uselfs.U):
204 This variable contains the compiler flags needed by large file builds
205 and added to ccflags by hints files.
208 This can set either by hints files or by Configure. If using
209 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
210 Some platforms, however, make good use of this by storing the
211 flavor of the C compiler being used here. For example if using
212 the Sun WorkShop suite, ccname will be 'workshop'.
214 ccsymbols (Cppsym.U):
215 The variable contains the symbols defined by the C compiler alone.
216 The symbols defined by cpp or by cc when it calls cpp are not in
217 this list, see cppsymbols and cppccsymbols.
218 The list is a space-separated list of symbol=value tokens.
220 ccversion (Checkcc.U):
221 This can set either by hints files or by Configure. If using
222 a (non-gcc) vendor cc, this variable may contain a version for
226 Login name of the person who ran the Configure script and answered the
227 questions. This is used to tag both config.sh and config_h.SH.
229 cf_email (cf_email.U):
230 Electronic mail address of the person who ran Configure. This can be
231 used by units that require the user's e-mail, like MailList.U.
234 Holds the output of the "date" command when the configuration file was
235 produced. This is used to tag both config.sh and config_h.SH.
237 charsize (charsize.U):
238 This variable contains the value of the CHARSIZE symbol, which
239 indicates to the C program how many bytes there are in a character.
242 This variable is defined but not used by Configure.
243 The value is a plain '' and is not useful.
246 This variable is defined but not used by Configure.
247 The value is a plain '' and is not useful.
250 This variable is defined but not used by Configure.
251 The value is a plain '' and is not useful.
253 clocktype (d_times.U):
254 This variable holds the type returned by times(). It can be long,
255 or clock_t on BSD sites (in which case <sys/types.h> should be
259 This variable is used internally by Configure to determine the
260 full pathname (if any) of the comm program. After Configure runs,
261 the value is reset to a plain "comm" and is not useful.
264 This variable is defined but not used by Configure.
265 The value is a plain '' and is not useful.
267 contains (contains.U):
268 This variable holds the command to do a grep with a proper return
269 status. On most sane systems it is simply "grep". On insane systems
270 it is a grep followed by a cat followed by a test. This variable
271 is primarily for the use of other Configure units.
274 This variable is used internally by Configure to determine the
275 full pathname (if any) of the cp program. After Configure runs,
276 the value is reset to a plain "cp" and is not useful.
279 This variable is defined but not used by Configure.
280 The value is a plain '' and is not useful.
283 This variable is used internally by Configure to determine the
284 full pathname (if any) of the cpp program. After Configure runs,
285 the value is reset to a plain "cpp" and is not useful.
287 cpp_stuff (cpp_stuff.U):
288 This variable contains an identification of the catenation mechanism
289 used by the C preprocessor.
291 cppccsymbols (Cppsym.U):
292 The variable contains the symbols defined by the C compiler
293 when it calls cpp. The symbols defined by the cc alone or cpp
294 alone are not in this list, see ccsymbols and cppsymbols.
295 The list is a space-separated list of symbol=value tokens.
297 cppflags (ccflags.U):
298 This variable holds the flags that will be passed to the C pre-
299 processor. It is up to the Makefile to use it.
301 cpplast (cppstdin.U):
302 This variable has the same functionality as cppminus, only it applies
303 to cpprun and not cppstdin.
305 cppminus (cppstdin.U):
306 This variable contains the second part of the string which will invoke
307 the C preprocessor on the standard input and produce to standard
308 output. This variable will have the value "-" if cppstdin needs
309 a minus to specify standard input, otherwise the value is "".
312 This variable contains the command which will invoke a C preprocessor
313 on standard input and put the output to stdout. It is guaranteed not
314 to be a wrapper and may be a null string if no preprocessor can be
315 made directly available. This preprocessor might be different from the
316 one used by the C compiler. Don't forget to append cpplast after the
317 preprocessor options.
319 cppstdin (cppstdin.U):
320 This variable contains the command which will invoke the C
321 preprocessor on standard input and put the output to stdout.
322 It is primarily used by other Configure units that ask about
323 preprocessor symbols.
325 cppsymbols (Cppsym.U):
326 The variable contains the symbols defined by the C preprocessor
327 alone. The symbols defined by cc or by cc when it calls cpp are
328 not in this list, see ccsymbols and cppccsymbols.
329 The list is a space-separated list of symbol=value tokens.
331 cryptlib (d_crypt.U):
332 This variable holds -lcrypt or the path to a libcrypt.a archive if
333 the crypt() function is not defined in the standard C library. It is
334 up to the Makefile to use this.
337 This variable is used internally by Configure to determine the
338 full pathname (if any) of the csh program. After Configure runs,
339 the value is reset to a plain "csh" and is not useful.
341 d__fwalk (d__fwalk.U):
342 This variable conditionally defines HAS__FWALK if _fwalk() is
343 available to apply a function to all the file handles.
345 d_access (d_access.U):
346 This variable conditionally defines HAS_ACCESS if the access() system
347 call is available to check for access permissions using real IDs.
349 d_accessx (d_accessx.U):
350 This variable conditionally defines the HAS_ACCESSX symbol, which
351 indicates to the C program that the accessx() routine is available.
354 This variable conditionally defines the HAS_ALARM symbol, which
355 indicates to the C program that the alarm() routine is available.
357 d_archlib (archlib.U):
358 This variable conditionally defines ARCHLIB to hold the pathname
359 of architecture-dependent library files for $package. If
360 $archlib is the same as $privlib, then this is set to undef.
363 This variable conditionally defines the HAS_ATOLF symbol, which
364 indicates to the C program that the atolf() routine is available.
367 This variable conditionally defines the HAS_ATOLL symbol, which
368 indicates to the C program that the atoll() routine is available.
370 d_attribut (d_attribut.U):
371 This variable conditionally defines HASATTRIBUTE, which
372 indicates the C compiler can check for function attributes,
373 such as printf formats.
376 This variable conditionally defines the HAS_BCMP symbol if
377 the bcmp() routine is available to compare strings.
380 This variable conditionally defines the HAS_BCOPY symbol if
381 the bcopy() routine is available to copy strings.
383 d_bincompat5005 (bincompat5005.U):
384 This variable conditionally defines BINCOMPAT5005 so that embed.h
385 can take special action if this version of Perl should be
386 binary-compatible with Perl 5.005. This is impossible for builds
387 that use features like threads and multiplicity it is always $undef
391 This symbol conditionally defines the symbol BSD when running on a
394 d_bsdgetpgrp (d_getpgrp.U):
395 This variable conditionally defines USE_BSD_GETPGRP if
396 getpgrp needs one arguments whereas USG one needs none.
398 d_bsdsetpgrp (d_setpgrp.U):
399 This variable conditionally defines USE_BSD_SETPGRP if
400 setpgrp needs two arguments whereas USG one needs none.
401 See also d_setpgid for a POSIX interface.
404 This variable conditionally defines the HAS_BZERO symbol if
405 the bzero() routine is available to set memory to 0.
407 d_casti32 (d_casti32.U):
408 This variable conditionally defines CASTI32, which indicates
409 whether the C compiler can cast large floats to 32-bit ints.
411 d_castneg (d_castneg.U):
412 This variable conditionally defines CASTNEG, which indicates
413 wether the C compiler can cast negative float to unsigned.
415 d_charvspr (d_vprintf.U):
416 This variable conditionally defines CHARVSPRINTF if this system
417 has vsprintf returning type (char*). The trend seems to be to
418 declare it as "int vsprintf()".
421 This variable conditionally defines the HAS_CHOWN symbol, which
422 indicates to the C program that the chown() routine is available.
424 d_chroot (d_chroot.U):
425 This variable conditionally defines the HAS_CHROOT symbol, which
426 indicates to the C program that the chroot() routine is available.
428 d_chsize (d_chsize.U):
429 This variable conditionally defines the CHSIZE symbol, which
430 indicates to the C program that the chsize() routine is available
431 to truncate files. You might need a -lx to get this routine.
433 d_closedir (d_closedir.U):
434 This variable conditionally defines HAS_CLOSEDIR if closedir() is
437 d_cmsghdr_s (d_cmsghdr_s.U):
438 This variable conditionally defines the HAS_STRUCT_CMSGHDR symbol,
439 which indicates that the struct cmsghdr is supported.
442 This variable conditionally defines the HASCONST symbol, which
443 indicates to the C program that this C compiler knows about the
447 This variable conditionally defines the CRYPT symbol, which
448 indicates to the C program that the crypt() routine is available
449 to encrypt passwords and the like.
452 This variable conditionally defines the CSH symbol, which
453 indicates to the C program that the C-shell exists.
455 d_cuserid (d_cuserid.U):
456 This variable conditionally defines the HAS_CUSERID symbol, which
457 indicates to the C program that the cuserid() routine is available
458 to get character login names.
460 d_dbl_dig (d_dbl_dig.U):
461 This variable conditionally defines d_dbl_dig if this system's
462 header files provide DBL_DIG, which is the number of significant
463 digits in a double precision number.
465 d_dbminitproto (d_dbminitproto.U):
466 This variable conditionally defines the HAS_DBMINIT_PROTO symbol,
467 which indicates to the C program that the system provides
468 a prototype for the dbminit() function. Otherwise, it is
469 up to the program to supply one.
471 d_difftime (d_difftime.U):
472 This variable conditionally defines the HAS_DIFFTIME symbol, which
473 indicates to the C program that the difftime() routine is available.
475 d_dirnamlen (i_dirent.U):
476 This variable conditionally defines DIRNAMLEN, which indicates
477 to the C program that the length of directory entry names is
478 provided by a d_namelen field.
480 d_dlerror (d_dlerror.U):
481 This variable conditionally defines the HAS_DLERROR symbol, which
482 indicates to the C program that the dlerror() routine is available.
484 d_dlopen (d_dlopen.U):
485 This variable conditionally defines the HAS_DLOPEN symbol, which
486 indicates to the C program that the dlopen() routine is available.
488 d_dlsymun (d_dlsymun.U):
489 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
490 indicates that we need to prepend an underscore to the symbol
491 name before calling dlsym().
493 d_dosuid (d_dosuid.U):
494 This variable conditionally defines the symbol DOSUID, which
495 tells the C program that it should insert setuid emulation code
496 on hosts which have setuid #! scripts disabled.
498 d_drand48proto (d_drand48proto.U):
499 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
500 which indicates to the C program that the system provides
501 a prototype for the drand48() function. Otherwise, it is
502 up to the program to supply one.
505 This variable conditionally defines HAS_DUP2 if dup2() is
506 available to duplicate file descriptors.
508 d_eaccess (d_eaccess.U):
509 This variable conditionally defines the HAS_EACCESS symbol, which
510 indicates to the C program that the eaccess() routine is available.
512 d_endgrent (d_endgrent.U):
513 This variable conditionally defines the HAS_ENDGRENT symbol, which
514 indicates to the C program that the endgrent() routine is available
515 for sequential access of the group database.
517 d_endhent (d_endhent.U):
518 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
519 available to close whatever was being used for host queries.
521 d_endnent (d_endnent.U):
522 This variable conditionally defines HAS_ENDNETENT if endnetent() is
523 available to close whatever was being used for network queries.
525 d_endpent (d_endpent.U):
526 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
527 available to close whatever was being used for protocol queries.
529 d_endpwent (d_endpwent.U):
530 This variable conditionally defines the HAS_ENDPWENT symbol, which
531 indicates to the C program that the endpwent() routine is available
532 for sequential access of the passwd database.
534 d_endsent (d_endsent.U):
535 This variable conditionally defines HAS_ENDSERVENT if endservent() is
536 available to close whatever was being used for service queries.
538 d_eofnblk (nblock_io.U):
539 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
540 when reading from a non-blocking I/O source.
543 This variable conditionally defines the symbols EUNICE and VAX, which
544 alerts the C program that it must deal with ideosyncracies of VMS.
546 d_fchdir (d_fchdir.U):
547 This variable conditionally defines the HAS_FCHDIR symbol, which
548 indicates to the C program that the fchdir() routine is available.
550 d_fchmod (d_fchmod.U):
551 This variable conditionally defines the HAS_FCHMOD symbol, which
552 indicates to the C program that the fchmod() routine is available
553 to change mode of opened files.
555 d_fchown (d_fchown.U):
556 This variable conditionally defines the HAS_FCHOWN symbol, which
557 indicates to the C program that the fchown() routine is available
558 to change ownership of opened files.
561 This variable conditionally defines the HAS_FCNTL symbol, and indicates
562 whether the fcntl() function exists
564 d_fcntl_can_lock (d_fcntl_can_lock.U):
565 This variable conditionally defines the FCNTL_CAN_LOCK symbol
566 and indicates whether file locking with fcntl() works.
568 d_fd_macros (d_fd_set.U):
569 This variable contains the eventual value of the HAS_FD_MACROS symbol,
570 which indicates if your C compiler knows about the macros which
571 manipulate an fd_set.
573 d_fd_set (d_fd_set.U):
574 This variable contains the eventual value of the HAS_FD_SET symbol,
575 which indicates if your C compiler knows about the fd_set typedef.
577 d_fds_bits (d_fd_set.U):
578 This variable contains the eventual value of the HAS_FDS_BITS symbol,
579 which indicates if your fd_set typedef contains the fds_bits member.
580 If you have an fd_set typedef, but the dweebs who installed it did
581 a half-fast job and neglected to provide the macros to manipulate
582 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
584 d_fgetpos (d_fgetpos.U):
585 This variable conditionally defines HAS_FGETPOS if fgetpos() is
586 available to get the file position indicator.
588 d_flexfnam (d_flexfnam.U):
589 This variable conditionally defines the FLEXFILENAMES symbol, which
590 indicates that the system supports filenames longer than 14 characters.
593 This variable conditionally defines HAS_FLOCK if flock() is
594 available to do file locking.
596 d_flockproto (d_flockproto.U):
597 This variable conditionally defines the HAS_FLOCK_PROTO symbol,
598 which indicates to the C program that the system provides
599 a prototype for the flock() function. Otherwise, it is
600 up to the program to supply one.
603 This variable conditionally defines the HAS_FORK symbol, which
604 indicates to the C program that the fork() routine is available.
606 d_fpathconf (d_pathconf.U):
607 This variable conditionally defines the HAS_FPATHCONF symbol, which
608 indicates to the C program that the pathconf() routine is available
609 to determine file-system related limits and options associated
610 with a given open file descriptor.
612 d_fpos64_t (d_fpos64_t.U):
613 This symbol will be defined if the C compiler supports fpos64_t.
615 d_frexpl (d_frexpl.U):
616 This variable conditionally defines the HAS_FREXPL symbol, which
617 indicates to the C program that the frexpl() routine is available.
619 d_fs_data_s (d_fs_data_s.U):
620 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
621 which indicates that the struct fs_data is supported.
623 d_fseeko (d_fseeko.U):
624 This variable conditionally defines the HAS_FSEEKO symbol, which
625 indicates to the C program that the fseeko() routine is available.
627 d_fsetpos (d_fsetpos.U):
628 This variable conditionally defines HAS_FSETPOS if fsetpos() is
629 available to set the file position indicator.
631 d_fstatfs (d_fstatfs.U):
632 This variable conditionally defines the HAS_FSTATFS symbol, which
633 indicates to the C program that the fstatfs() routine is available.
635 d_fstatvfs (d_statvfs.U):
636 This variable conditionally defines the HAS_FSTATVFS symbol, which
637 indicates to the C program that the fstatvfs() routine is available.
640 This variable conditionally defines the HAS_FSYNC symbol, which
641 indicates to the C program that the fsync() routine is available.
643 d_ftello (d_ftello.U):
644 This variable conditionally defines the HAS_FTELLO symbol, which
645 indicates to the C program that the ftello() routine is available.
648 This variable conditionally defines the HAS_FTIME symbol, which indicates
649 that the ftime() routine exists. The ftime() routine is basically
650 a sub-second accuracy clock.
652 d_Gconvert (d_gconvert.U):
653 This variable holds what Gconvert is defined as to convert
654 floating point numbers into strings. It could be 'gconvert'
655 or a more complex macro emulating gconvert with gcvt() or sprintf.
657 d_Gconvert='gconvert((x),(n),(t),(b))'
658 d_Gconvert='gcvt((x),(n),(b))'
659 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
661 d_getcwd (d_getcwd.U):
662 This variable conditionally defines the HAS_GETCWD symbol, which
663 indicates to the C program that the getcwd() routine is available
664 to get the current working directory.
666 d_getespwnam (d_getespwnam.U):
667 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
668 available to retrieve enchanced (shadow) password entries by name.
670 d_getfsstat (d_getfsstat.U):
671 This variable conditionally defines the HAS_GETFSSTAT symbol, which
672 indicates to the C program that the getfsstat() routine is available.
674 d_getgrent (d_getgrent.U):
675 This variable conditionally defines the HAS_GETGRENT symbol, which
676 indicates to the C program that the getgrent() routine is available
677 for sequential access of the group database.
679 d_getgrps (d_getgrps.U):
680 This variable conditionally defines the HAS_GETGROUPS symbol, which
681 indicates to the C program that the getgroups() routine is available
682 to get the list of process groups.
684 d_gethbyaddr (d_gethbyad.U):
685 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
686 indicates to the C program that the gethostbyaddr() routine is available
687 to look up hosts by their IP addresses.
689 d_gethbyname (d_gethbynm.U):
690 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
691 indicates to the C program that the gethostbyname() routine is available
692 to look up host names in some data base or other.
694 d_gethent (d_gethent.U):
695 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
696 available to look up host names in some data base or another.
698 d_gethname (d_gethname.U):
699 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
700 indicates to the C program that the gethostname() routine may be
701 used to derive the host name.
703 d_gethostprotos (d_gethostprotos.U):
704 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
705 which indicates to the C program that <netdb.h> supplies
706 prototypes for the various gethost*() functions.
707 See also netdbtype.U for probing for various netdb types.
709 d_getitimer (d_getitimer.U):
710 This variable conditionally defines the HAS_GETITIMER symbol, which
711 indicates to the C program that the getitimer() routine is available.
713 d_getlogin (d_getlogin.U):
714 This variable conditionally defines the HAS_GETLOGIN symbol, which
715 indicates to the C program that the getlogin() routine is available
716 to get the login name.
718 d_getmnt (d_getmnt.U):
719 This variable conditionally defines the HAS_GETMNT symbol, which
720 indicates to the C program that the getmnt() routine is available
721 to retrieve one or more mount info blocks by filename.
723 d_getmntent (d_getmntent.U):
724 This variable conditionally defines the HAS_GETMNTENT symbol, which
725 indicates to the C program that the getmntent() routine is available
726 to iterate through mounted files to get their mount info.
728 d_getnbyaddr (d_getnbyad.U):
729 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
730 indicates to the C program that the getnetbyaddr() routine is available
731 to look up networks by their IP addresses.
733 d_getnbyname (d_getnbynm.U):
734 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
735 indicates to the C program that the getnetbyname() routine is available
736 to look up networks by their names.
738 d_getnent (d_getnent.U):
739 This variable conditionally defines HAS_GETNETENT if getnetent() is
740 available to look up network names in some data base or another.
742 d_getnetprotos (d_getnetprotos.U):
743 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
744 which indicates to the C program that <netdb.h> supplies
745 prototypes for the various getnet*() functions.
746 See also netdbtype.U for probing for various netdb types.
748 d_getpagsz (d_getpagsz.U):
749 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
750 is available to get the system page size.
752 d_getpbyname (d_getprotby.U):
753 This variable conditionally defines the HAS_GETPROTOBYNAME
754 symbol, which indicates to the C program that the
755 getprotobyname() routine is available to look up protocols
758 d_getpbynumber (d_getprotby.U):
759 This variable conditionally defines the HAS_GETPROTOBYNUMBER
760 symbol, which indicates to the C program that the
761 getprotobynumber() routine is available to look up protocols
764 d_getpent (d_getpent.U):
765 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
766 available to look up protocols in some data base or another.
768 d_getpgid (d_getpgid.U):
769 This variable conditionally defines the HAS_GETPGID symbol, which
770 indicates to the C program that the getpgid(pid) function
771 is available to get the process group id.
773 d_getpgrp2 (d_getpgrp2.U):
774 This variable conditionally defines the HAS_GETPGRP2 symbol, which
775 indicates to the C program that the getpgrp2() (as in DG/UX) routine
776 is available to get the current process group.
778 d_getpgrp (d_getpgrp.U):
779 This variable conditionally defines HAS_GETPGRP if getpgrp() is
780 available to get the current process group.
782 d_getppid (d_getppid.U):
783 This variable conditionally defines the HAS_GETPPID symbol, which
784 indicates to the C program that the getppid() routine is available
785 to get the parent process ID.
787 d_getprior (d_getprior.U):
788 This variable conditionally defines HAS_GETPRIORITY if getpriority()
789 is available to get a process's priority.
791 d_getprotoprotos (d_getprotoprotos.U):
792 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
793 which indicates to the C program that <netdb.h> supplies
794 prototypes for the various getproto*() functions.
795 See also netdbtype.U for probing for various netdb types.
797 d_getprpwnam (d_getprpwnam.U):
798 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
799 available to retrieve protected (shadow) password entries by name.
801 d_getpwent (d_getpwent.U):
802 This variable conditionally defines the HAS_GETPWENT symbol, which
803 indicates to the C program that the getpwent() routine is available
804 for sequential access of the passwd database.
806 d_getsbyname (d_getsrvby.U):
807 This variable conditionally defines the HAS_GETSERVBYNAME
808 symbol, which indicates to the C program that the
809 getservbyname() routine is available to look up services
812 d_getsbyport (d_getsrvby.U):
813 This variable conditionally defines the HAS_GETSERVBYPORT
814 symbol, which indicates to the C program that the
815 getservbyport() routine is available to look up services
818 d_getsent (d_getsent.U):
819 This variable conditionally defines HAS_GETSERVENT if getservent() is
820 available to look up network services in some data base or another.
822 d_getservprotos (d_getservprotos.U):
823 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
824 which indicates to the C program that <netdb.h> supplies
825 prototypes for the various getserv*() functions.
826 See also netdbtype.U for probing for various netdb types.
828 d_getspnam (d_getspnam.U):
829 This variable conditionally defines HAS_GETSPNAM if getspnam() is
830 available to retrieve SysV shadow password entries by name.
832 d_gettimeod (d_ftime.U):
833 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
834 indicates that the gettimeofday() system call exists (to obtain a
835 sub-second accuracy clock). You should probably include <sys/resource.h>.
837 d_gnulibc (d_gnulibc.U):
838 Defined if we're dealing with the GNU C Library.
840 d_grpasswd (i_grp.U):
841 This variable conditionally defines GRPASSWD, which indicates
842 that struct group in <grp.h> contains gr_passwd.
844 d_hasmntopt (d_hasmntopt.U):
845 This variable conditionally defines the HAS_HASMNTOPT symbol, which
846 indicates to the C program that the hasmntopt() routine is available
847 to query the mount options of file systems.
850 This variable conditionally defines HAS_HTONL if htonl() and its
851 friends are available to do network order byte swapping.
854 This variable conditionally defines the HAS_ICONV symbol, which
855 indicates to the C program that the iconv() routine is available.
857 d_index (d_strchr.U):
858 This variable conditionally defines HAS_INDEX if index() and
859 rindex() are available for string searching.
861 d_inetaton (d_inetaton.U):
862 This variable conditionally defines the HAS_INET_ATON symbol, which
863 indicates to the C program that the inet_aton() function is available
864 to parse IP address "dotted-quad" strings.
866 d_int64_t (d_int64_t.U):
867 This symbol will be defined if the C compiler supports int64_t.
869 d_isascii (d_isascii.U):
870 This variable conditionally defines the HAS_ISASCII constant,
871 which indicates to the C program that isascii() is available.
874 This variable conditionally defines the HAS_ISNAN symbol, which
875 indicates to the C program that the isnan() routine is available.
877 d_isnanl (d_isnanl.U):
878 This variable conditionally defines the HAS_ISNANL symbol, which
879 indicates to the C program that the isnanl() routine is available.
881 d_killpg (d_killpg.U):
882 This variable conditionally defines the HAS_KILLPG symbol, which
883 indicates to the C program that the killpg() routine is available
884 to kill process groups.
886 d_lchown (d_lchown.U):
887 This variable conditionally defines the HAS_LCHOWN symbol, which
888 indicates to the C program that the lchown() routine is available
889 to operate on a symbolic link (instead of following the link).
891 d_ldbl_dig (d_ldbl_dig.U):
892 This variable conditionally defines d_ldbl_dig if this system's
893 header files provide LDBL_DIG, which is the number of significant
894 digits in a long double precision number.
897 This variable conditionally defines HAS_LINK if link() is
898 available to create hard links.
900 d_locconv (d_locconv.U):
901 This variable conditionally defines HAS_LOCALECONV if localeconv() is
902 available for numeric and monetary formatting conventions.
905 This variable conditionally defines HAS_LOCKF if lockf() is
906 available to do file locking.
908 d_longdbl (d_longdbl.U):
909 This variable conditionally defines HAS_LONG_DOUBLE if
910 the long double type is supported.
912 d_longlong (d_longlong.U):
913 This variable conditionally defines HAS_LONG_LONG if
914 the long long type is supported.
916 d_lseekproto (d_lseekproto.U):
917 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
918 which indicates to the C program that the system provides
919 a prototype for the lseek() function. Otherwise, it is
920 up to the program to supply one.
923 This variable conditionally defines HAS_LSTAT if lstat() is
924 available to do file stats on symbolic links.
926 d_madvise (d_madvise.U):
927 This variable conditionally defines HAS_MADVISE if madvise() is
928 available to map a file into memory.
931 This variable conditionally defines the HAS_MBLEN symbol, which
932 indicates to the C program that the mblen() routine is available
933 to find the number of bytes in a multibye character.
935 d_mbstowcs (d_mbstowcs.U):
936 This variable conditionally defines the HAS_MBSTOWCS symbol, which
937 indicates to the C program that the mbstowcs() routine is available
938 to convert a multibyte string into a wide character string.
940 d_mbtowc (d_mbtowc.U):
941 This variable conditionally defines the HAS_MBTOWC symbol, which
942 indicates to the C program that the mbtowc() routine is available
943 to convert multibyte to a wide character.
945 d_memchr (d_memchr.U):
946 This variable conditionally defines the HAS_MEMCHR symbol, which
947 indicates to the C program that the memchr() routine is available
948 to locate characters within a C string.
950 d_memcmp (d_memcmp.U):
951 This variable conditionally defines the HAS_MEMCMP symbol, which
952 indicates to the C program that the memcmp() routine is available
953 to compare blocks of memory.
955 d_memcpy (d_memcpy.U):
956 This variable conditionally defines the HAS_MEMCPY symbol, which
957 indicates to the C program that the memcpy() routine is available
958 to copy blocks of memory.
960 d_memmove (d_memmove.U):
961 This variable conditionally defines the HAS_MEMMOVE symbol, which
962 indicates to the C program that the memmove() routine is available
963 to copy potentatially overlapping blocks of memory.
965 d_memset (d_memset.U):
966 This variable conditionally defines the HAS_MEMSET symbol, which
967 indicates to the C program that the memset() routine is available
968 to set blocks of memory.
971 This variable conditionally defines the HAS_MKDIR symbol, which
972 indicates to the C program that the mkdir() routine is available
973 to create directories..
975 d_mkdtemp (d_mkdtemp.U):
976 This variable conditionally defines the HAS_MKDTEMP symbol, which
977 indicates to the C program that the mkdtemp() routine is available
978 to exclusively create a uniquely named temporary directory.
980 d_mkfifo (d_mkfifo.U):
981 This variable conditionally defines the HAS_MKFIFO symbol, which
982 indicates to the C program that the mkfifo() routine is available.
984 d_mkstemp (d_mkstemp.U):
985 This variable conditionally defines the HAS_MKSTEMP symbol, which
986 indicates to the C program that the mkstemp() routine is available
987 to exclusively create and open a uniquely named temporary file.
989 d_mkstemps (d_mkstemps.U):
990 This variable conditionally defines the HAS_MKSTEMPS symbol, which
991 indicates to the C program that the mkstemps() routine is available
992 to exclusively create and open a uniquely named (with a suffix)
995 d_mktime (d_mktime.U):
996 This variable conditionally defines the HAS_MKTIME symbol, which
997 indicates to the C program that the mktime() routine is available.
1000 This variable conditionally defines HAS_MMAP if mmap() is
1001 available to map a file into memory.
1003 d_modfl (d_modfl.U):
1004 This variable conditionally defines the HAS_MODFL symbol, which
1005 indicates to the C program that the modfl() routine is available.
1007 d_modfl_pow32_bug (d_modfl.U):
1008 This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
1009 which indicates that modfl() is broken for long doubles >= pow(2, 32).
1010 For example from 4294967303.150000 one would get 4294967302.000000
1011 and 1.150000. The bug has been seen in certain versions of glibc,
1012 release 2.2.2 is known to be okay.
1014 d_mprotect (d_mprotect.U):
1015 This variable conditionally defines HAS_MPROTECT if mprotect() is
1016 available to modify the access protection of a memory mapped file.
1019 This variable conditionally defines the HAS_MSG symbol, which
1020 indicates that the entire msg*(2) library is present.
1022 d_msg_ctrunc (d_socket.U):
1023 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
1024 which indicates that the MSG_CTRUNC is available. #ifdef is
1025 not enough because it may be an enum, glibc has been known to do this.
1027 d_msg_dontroute (d_socket.U):
1028 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
1029 which indicates that the MSG_DONTROUTE is available. #ifdef is
1030 not enough because it may be an enum, glibc has been known to do this.
1032 d_msg_oob (d_socket.U):
1033 This variable conditionally defines the HAS_MSG_OOB symbol,
1034 which indicates that the MSG_OOB is available. #ifdef is
1035 not enough because it may be an enum, glibc has been known to do this.
1037 d_msg_peek (d_socket.U):
1038 This variable conditionally defines the HAS_MSG_PEEK symbol,
1039 which indicates that the MSG_PEEK is available. #ifdef is
1040 not enough because it may be an enum, glibc has been known to do this.
1042 d_msg_proxy (d_socket.U):
1043 This variable conditionally defines the HAS_MSG_PROXY symbol,
1044 which indicates that the MSG_PROXY is available. #ifdef is
1045 not enough because it may be an enum, glibc has been known to do this.
1047 d_msgctl (d_msgctl.U):
1048 This variable conditionally defines the HAS_MSGCTL symbol, which
1049 indicates to the C program that the msgctl() routine is available.
1051 d_msgget (d_msgget.U):
1052 This variable conditionally defines the HAS_MSGGET symbol, which
1053 indicates to the C program that the msgget() routine is available.
1055 d_msghdr_s (d_msghdr_s.U):
1056 This variable conditionally defines the HAS_STRUCT_MSGHDR symbol,
1057 which indicates that the struct msghdr is supported.
1059 d_msgrcv (d_msgrcv.U):
1060 This variable conditionally defines the HAS_MSGRCV symbol, which
1061 indicates to the C program that the msgrcv() routine is available.
1063 d_msgsnd (d_msgsnd.U):
1064 This variable conditionally defines the HAS_MSGSND symbol, which
1065 indicates to the C program that the msgsnd() routine is available.
1067 d_msync (d_msync.U):
1068 This variable conditionally defines HAS_MSYNC if msync() is
1069 available to synchronize a mapped file.
1071 d_munmap (d_munmap.U):
1072 This variable conditionally defines HAS_MUNMAP if munmap() is
1073 available to unmap a region mapped by mmap().
1075 d_mymalloc (mallocsrc.U):
1076 This variable conditionally defines MYMALLOC in case other parts
1077 of the source want to take special action if MYMALLOC is used.
1078 This may include different sorts of profiling or error detection.
1081 This variable conditionally defines the HAS_NICE symbol, which
1082 indicates to the C program that the nice() routine is available.
1084 d_nv_preserves_uv (perlxv.U):
1085 This variable indicates whether a variable of type nvtype
1086 can preserve all the bits a variable of type uvtype.
1088 d_nv_preserves_uv_bits (perlxv.U):
1089 This variable indicates how many of bits type uvtype
1090 a variable nvtype can preserve.
1092 d_off64_t (d_off64_t.U):
1093 This symbol will be defined if the C compiler supports off64_t.
1095 d_old_pthread_create_joinable (d_pthrattrj.U):
1096 This variable conditionally defines pthread_create_joinable.
1097 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1099 d_oldpthreads (usethreads.U):
1100 This variable conditionally defines the OLD_PTHREADS_API symbol,
1101 and indicates that Perl should be built to use the old
1102 draft POSIX threads API. This is only potentially meaningful if
1105 d_oldsock (d_socket.U):
1106 This variable conditionally defines the OLDSOCKET symbol, which
1107 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1109 d_open3 (d_open3.U):
1110 This variable conditionally defines the HAS_OPEN3 manifest constant,
1111 which indicates to the C program that the 3 argument version of
1112 the open(2) function is available.
1114 d_pathconf (d_pathconf.U):
1115 This variable conditionally defines the HAS_PATHCONF symbol, which
1116 indicates to the C program that the pathconf() routine is available
1117 to determine file-system related limits and options associated
1118 with a given filename.
1120 d_pause (d_pause.U):
1121 This variable conditionally defines the HAS_PAUSE symbol, which
1122 indicates to the C program that the pause() routine is available
1123 to suspend a process until a signal is received.
1125 d_perl_otherlibdirs (otherlibdirs.U):
1126 This variable conditionally defines PERL_OTHERLIBDIRS, which
1127 contains a colon-separated set of paths for the perl binary to
1128 include in @INC. See also otherlibdirs.
1130 d_phostname (d_gethname.U):
1131 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1132 contains the shell command which, when fed to popen(), may be
1133 used to derive the host name.
1136 This variable conditionally defines the HAS_PIPE symbol, which
1137 indicates to the C program that the pipe() routine is available
1138 to create an inter-process channel.
1141 This variable conditionally defines the HAS_POLL symbol, which
1142 indicates to the C program that the poll() routine is available
1143 to poll active file descriptors.
1145 d_portable (d_portable.U):
1146 This variable conditionally defines the PORTABLE symbol, which
1147 indicates to the C program that it should not assume that it is
1148 running on the machine it was compiled on.
1150 d_PRId64 (quadfio.U):
1151 This variable conditionally defines the PERL_PRId64 symbol, which
1152 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1154 d_PRIeldbl (longdblfio.U):
1155 This variable conditionally defines the PERL_PRIfldbl symbol, which
1156 indiciates that stdio has a symbol to print long doubles.
1158 d_PRIEUldbl (longdblfio.U):
1159 This variable conditionally defines the PERL_PRIfldbl symbol, which
1160 indiciates that stdio has a symbol to print long doubles.
1161 The 'U' in the name is to separate this from d_PRIeldbl so that even
1162 case-blind systems can see the difference.
1164 d_PRIfldbl (longdblfio.U):
1165 This variable conditionally defines the PERL_PRIfldbl symbol, which
1166 indiciates that stdio has a symbol to print long doubles.
1168 d_PRIFUldbl (longdblfio.U):
1169 This variable conditionally defines the PERL_PRIfldbl symbol, which
1170 indiciates that stdio has a symbol to print long doubles.
1171 The 'U' in the name is to separate this from d_PRIfldbl so that even
1172 case-blind systems can see the difference.
1174 d_PRIgldbl (longdblfio.U):
1175 This variable conditionally defines the PERL_PRIfldbl symbol, which
1176 indiciates that stdio has a symbol to print long doubles.
1178 d_PRIGUldbl (longdblfio.U):
1179 This variable conditionally defines the PERL_PRIfldbl symbol, which
1180 indiciates that stdio has a symbol to print long doubles.
1181 The 'U' in the name is to separate this from d_PRIgldbl so that even
1182 case-blind systems can see the difference.
1184 d_PRIi64 (quadfio.U):
1185 This variable conditionally defines the PERL_PRIi64 symbol, which
1186 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1188 d_PRIo64 (quadfio.U):
1189 This variable conditionally defines the PERL_PRIo64 symbol, which
1190 indiciates that stdio has a symbol to print 64-bit octal numbers.
1192 d_PRIu64 (quadfio.U):
1193 This variable conditionally defines the PERL_PRIu64 symbol, which
1194 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1197 d_PRIx64 (quadfio.U):
1198 This variable conditionally defines the PERL_PRIx64 symbol, which
1199 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1201 d_PRIXU64 (quadfio.U):
1202 This variable conditionally defines the PERL_PRIXU64 symbol, which
1203 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1204 The 'U' in the name is to separate this from d_PRIx64 so that even
1205 case-blind systems can see the difference.
1207 d_pthread_yield (d_pthread_y.U):
1208 This variable conditionally defines the HAS_PTHREAD_YIELD
1209 symbol if the pthread_yield routine is available to yield
1210 the execution of the current thread.
1213 This variable conditionally defines PWAGE, which indicates
1214 that struct passwd contains pw_age.
1216 d_pwchange (i_pwd.U):
1217 This variable conditionally defines PWCHANGE, which indicates
1218 that struct passwd contains pw_change.
1220 d_pwclass (i_pwd.U):
1221 This variable conditionally defines PWCLASS, which indicates
1222 that struct passwd contains pw_class.
1224 d_pwcomment (i_pwd.U):
1225 This variable conditionally defines PWCOMMENT, which indicates
1226 that struct passwd contains pw_comment.
1228 d_pwexpire (i_pwd.U):
1229 This variable conditionally defines PWEXPIRE, which indicates
1230 that struct passwd contains pw_expire.
1232 d_pwgecos (i_pwd.U):
1233 This variable conditionally defines PWGECOS, which indicates
1234 that struct passwd contains pw_gecos.
1236 d_pwpasswd (i_pwd.U):
1237 This variable conditionally defines PWPASSWD, which indicates
1238 that struct passwd contains pw_passwd.
1240 d_pwquota (i_pwd.U):
1241 This variable conditionally defines PWQUOTA, which indicates
1242 that struct passwd contains pw_quota.
1244 d_qgcvt (d_qgcvt.U):
1245 This variable conditionally defines the HAS_QGCVT symbol, which
1246 indicates to the C program that the qgcvt() routine is available.
1248 d_quad (quadtype.U):
1249 This variable, if defined, tells that there's a 64-bit integer type,
1252 d_readdir (d_readdir.U):
1253 This variable conditionally defines HAS_READDIR if readdir() is
1254 available to read directory entries.
1256 d_readlink (d_readlink.U):
1257 This variable conditionally defines the HAS_READLINK symbol, which
1258 indicates to the C program that the readlink() routine is available
1259 to read the value of a symbolic link.
1261 d_readv (d_readv.U):
1262 This variable conditionally defines the HAS_READV symbol, which
1263 indicates to the C program that the readv() routine is available.
1265 d_recvmsg (d_recvmsg.U):
1266 This variable conditionally defines the HAS_RECVMSG symbol, which
1267 indicates to the C program that the recvmsg() routine is available.
1269 d_rename (d_rename.U):
1270 This variable conditionally defines the HAS_RENAME symbol, which
1271 indicates to the C program that the rename() routine is available
1274 d_rewinddir (d_readdir.U):
1275 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1278 d_rmdir (d_rmdir.U):
1279 This variable conditionally defines HAS_RMDIR if rmdir() is
1280 available to remove directories.
1282 d_safebcpy (d_safebcpy.U):
1283 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1284 the bcopy() routine can do overlapping copies.
1286 d_safemcpy (d_safemcpy.U):
1287 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1288 the memcpy() routine can do overlapping copies.
1290 d_sanemcmp (d_sanemcmp.U):
1291 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1292 the memcpy() routine is available and can be used to compare relative
1293 magnitudes of chars with their high bits set.
1295 d_sbrkproto (d_sbrkproto.U):
1296 This variable conditionally defines the HAS_SBRK_PROTO symbol,
1297 which indicates to the C program that the system provides
1298 a prototype for the sbrk() function. Otherwise, it is
1299 up to the program to supply one.
1301 d_sched_yield (d_pthread_y.U):
1302 This variable conditionally defines the HAS_SCHED_YIELD
1303 symbol if the sched_yield routine is available to yield
1304 the execution of the current thread.
1306 d_scm_rights (d_socket.U):
1307 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1308 which indicates that the SCM_RIGHTS is available. #ifdef is
1309 not enough because it may be an enum, glibc has been known to do this.
1311 d_SCNfldbl (longdblfio.U):
1312 This variable conditionally defines the PERL_PRIfldbl symbol, which
1313 indiciates that stdio has a symbol to scan long doubles.
1315 d_seekdir (d_readdir.U):
1316 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1319 d_select (d_select.U):
1320 This variable conditionally defines HAS_SELECT if select() is
1321 available to select active file descriptors. A <sys/time.h>
1322 inclusion may be necessary for the timeout field.
1325 This variable conditionally defines the HAS_SEM symbol, which
1326 indicates that the entire sem*(2) library is present.
1328 d_semctl (d_semctl.U):
1329 This variable conditionally defines the HAS_SEMCTL symbol, which
1330 indicates to the C program that the semctl() routine is available.
1332 d_semctl_semid_ds (d_union_semun.U):
1333 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1334 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1336 d_semctl_semun (d_union_semun.U):
1337 This variable conditionally defines USE_SEMCTL_SEMUN, which
1338 indicates that union semun is to be used for semctl IPC_STAT.
1340 d_semget (d_semget.U):
1341 This variable conditionally defines the HAS_SEMGET symbol, which
1342 indicates to the C program that the semget() routine is available.
1344 d_semop (d_semop.U):
1345 This variable conditionally defines the HAS_SEMOP symbol, which
1346 indicates to the C program that the semop() routine is available.
1348 d_sendmsg (d_sendmsg.U):
1349 This variable conditionally defines the HAS_SENDMSG symbol, which
1350 indicates to the C program that the sendmsg() routine is available.
1352 d_setegid (d_setegid.U):
1353 This variable conditionally defines the HAS_SETEGID symbol, which
1354 indicates to the C program that the setegid() routine is available
1355 to change the effective gid of the current program.
1357 d_seteuid (d_seteuid.U):
1358 This variable conditionally defines the HAS_SETEUID symbol, which
1359 indicates to the C program that the seteuid() routine is available
1360 to change the effective uid of the current program.
1362 d_setgrent (d_setgrent.U):
1363 This variable conditionally defines the HAS_SETGRENT symbol, which
1364 indicates to the C program that the setgrent() routine is available
1365 for initializing sequential access to the group database.
1367 d_setgrps (d_setgrps.U):
1368 This variable conditionally defines the HAS_SETGROUPS symbol, which
1369 indicates to the C program that the setgroups() routine is available
1370 to set the list of process groups.
1372 d_sethent (d_sethent.U):
1373 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1376 d_setitimer (d_setitimer.U):
1377 This variable conditionally defines the HAS_SETITIMER symbol, which
1378 indicates to the C program that the setitimer() routine is available.
1380 d_setlinebuf (d_setlnbuf.U):
1381 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1382 indicates to the C program that the setlinebuf() routine is available
1383 to change stderr or stdout from block-buffered or unbuffered to a
1386 d_setlocale (d_setlocale.U):
1387 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1388 available to handle locale-specific ctype implementations.
1390 d_setnent (d_setnent.U):
1391 This variable conditionally defines HAS_SETNETENT if setnetent() is
1394 d_setpent (d_setpent.U):
1395 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1398 d_setpgid (d_setpgid.U):
1399 This variable conditionally defines the HAS_SETPGID symbol if the
1400 setpgid(pid, gpid) function is available to set process group ID.
1402 d_setpgrp2 (d_setpgrp2.U):
1403 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1404 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1405 is available to set the current process group.
1407 d_setpgrp (d_setpgrp.U):
1408 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1409 available to set the current process group.
1411 d_setprior (d_setprior.U):
1412 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1413 is available to set a process's priority.
1415 d_setproctitle (d_setproctitle.U):
1416 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1417 which indicates to the C program that the setproctitle() routine
1420 d_setpwent (d_setpwent.U):
1421 This variable conditionally defines the HAS_SETPWENT symbol, which
1422 indicates to the C program that the setpwent() routine is available
1423 for initializing sequential access to the passwd database.
1425 d_setregid (d_setregid.U):
1426 This variable conditionally defines HAS_SETREGID if setregid() is
1427 available to change the real and effective gid of the current
1430 d_setresgid (d_setregid.U):
1431 This variable conditionally defines HAS_SETRESGID if setresgid() is
1432 available to change the real, effective and saved gid of the current
1435 d_setresuid (d_setreuid.U):
1436 This variable conditionally defines HAS_SETREUID if setresuid() is
1437 available to change the real, effective and saved uid of the current
1440 d_setreuid (d_setreuid.U):
1441 This variable conditionally defines HAS_SETREUID if setreuid() is
1442 available to change the real and effective uid of the current
1445 d_setrgid (d_setrgid.U):
1446 This variable conditionally defines the HAS_SETRGID symbol, which
1447 indicates to the C program that the setrgid() routine is available
1448 to change the real gid of the current program.
1450 d_setruid (d_setruid.U):
1451 This variable conditionally defines the HAS_SETRUID symbol, which
1452 indicates to the C program that the setruid() routine is available
1453 to change the real uid of the current program.
1455 d_setsent (d_setsent.U):
1456 This variable conditionally defines HAS_SETSERVENT if setservent() is
1459 d_setsid (d_setsid.U):
1460 This variable conditionally defines HAS_SETSID if setsid() is
1461 available to set the process group ID.
1463 d_setvbuf (d_setvbuf.U):
1464 This variable conditionally defines the HAS_SETVBUF symbol, which
1465 indicates to the C program that the setvbuf() routine is available
1466 to change buffering on an open stdio stream.
1469 This variable conditionally defines the USE_SFIO symbol,
1470 and indicates whether sfio is available (and should be used).
1473 This variable conditionally defines the HAS_SHM symbol, which
1474 indicates that the entire shm*(2) library is present.
1476 d_shmat (d_shmat.U):
1477 This variable conditionally defines the HAS_SHMAT symbol, which
1478 indicates to the C program that the shmat() routine is available.
1480 d_shmatprototype (d_shmat.U):
1481 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1482 symbol, which indicates that sys/shm.h has a prototype for
1485 d_shmctl (d_shmctl.U):
1486 This variable conditionally defines the HAS_SHMCTL symbol, which
1487 indicates to the C program that the shmctl() routine is available.
1489 d_shmdt (d_shmdt.U):
1490 This variable conditionally defines the HAS_SHMDT symbol, which
1491 indicates to the C program that the shmdt() routine is available.
1493 d_shmget (d_shmget.U):
1494 This variable conditionally defines the HAS_SHMGET symbol, which
1495 indicates to the C program that the shmget() routine is available.
1497 d_sigaction (d_sigaction.U):
1498 This variable conditionally defines the HAS_SIGACTION symbol, which
1499 indicates that the Vr4 sigaction() routine is available.
1501 d_sigprocmask (d_sigprocmask.U):
1502 This variable conditionally defines HAS_SIGPROCMASK
1503 if sigprocmask() is available to examine or change the signal mask
1504 of the calling process.
1506 d_sigsetjmp (d_sigsetjmp.U):
1507 This variable conditionally defines the HAS_SIGSETJMP symbol,
1508 which indicates that the sigsetjmp() routine is available to
1509 call setjmp() and optionally save the process's signal mask.
1511 d_sockatmark (d_sockatmark.U):
1512 This variable conditionally defines the HAS_SOCKATMARK symbol, which
1513 indicates to the C program that the sockatmark() routine is available.
1515 d_sockatmarkproto (d_sockatmarkproto.U):
1516 This variable conditionally defines the HAS_SOCKATMARK_PROTO symbol,
1517 which indicates to the C program that the system provides
1518 a prototype for the sockatmark() function. Otherwise, it is
1519 up to the program to supply one.
1521 d_socket (d_socket.U):
1522 This variable conditionally defines HAS_SOCKET, which indicates
1523 that the BSD socket interface is supported.
1525 d_socklen_t (d_socklen_t.U):
1526 This symbol will be defined if the C compiler supports socklen_t.
1528 d_sockpair (d_socket.U):
1529 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1530 indicates that the BSD socketpair() is supported.
1532 d_socks5_init (d_socks5_init.U):
1533 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1534 indicates to the C program that the socks5_init() routine is available.
1536 d_sqrtl (d_sqrtl.U):
1537 This variable conditionally defines the HAS_SQRTL symbol, which
1538 indicates to the C program that the sqrtl() routine is available.
1540 d_sresgproto (d_sresgproto.U):
1541 This variable conditionally defines the HAS_SETRESGID_PROTO symbol,
1542 which indicates to the C program that the system provides
1543 a prototype for the setresgid() function. Otherwise, it is
1544 up to the program to supply one.
1546 d_sresuproto (d_sresuproto.U):
1547 This variable conditionally defines the HAS_SETRESUID_PROTO symbol,
1548 which indicates to the C program that the system provides
1549 a prototype for the setresuid() function. Otherwise, it is
1550 up to the program to supply one.
1552 d_statblks (d_statblks.U):
1553 This variable conditionally defines USE_STAT_BLOCKS
1554 if this system has a stat structure declaring
1555 st_blksize and st_blocks.
1557 d_statfs_f_flags (d_statfs_f_flags.U):
1558 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1559 symbol, which indicates to struct statfs from has f_flags member.
1560 This kind of struct statfs is coming from sys/mount.h (BSD),
1561 not from sys/statfs.h (SYSV).
1563 d_statfs_s (d_statfs_s.U):
1564 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1565 which indicates that the struct statfs is supported.
1567 d_statvfs (d_statvfs.U):
1568 This variable conditionally defines the HAS_STATVFS symbol, which
1569 indicates to the C program that the statvfs() routine is available.
1571 d_stdio_cnt_lval (d_stdstdio.U):
1572 This variable conditionally defines STDIO_CNT_LVALUE if the
1573 FILE_cnt macro can be used as an lvalue.
1575 d_stdio_ptr_lval (d_stdstdio.U):
1576 This variable conditionally defines STDIO_PTR_LVALUE if the
1577 FILE_ptr macro can be used as an lvalue.
1579 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1580 This symbol is defined if using the FILE_ptr macro as an lvalue
1581 to increase the pointer by n leaves File_cnt(fp) unchanged.
1583 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1584 This symbol is defined if using the FILE_ptr macro as an lvalue
1585 to increase the pointer by n has the side effect of decreasing the
1586 value of File_cnt(fp) by n.
1588 d_stdio_stream_array (stdio_streams.U):
1589 This variable tells whether there is an array holding
1592 d_stdiobase (d_stdstdio.U):
1593 This variable conditionally defines USE_STDIO_BASE if this system
1594 has a FILE structure declaring a usable _base field (or equivalent)
1597 d_stdstdio (d_stdstdio.U):
1598 This variable conditionally defines USE_STDIO_PTR if this system
1599 has a FILE structure declaring usable _ptr and _cnt fields (or
1600 equivalent) in stdio.h.
1602 d_strchr (d_strchr.U):
1603 This variable conditionally defines HAS_STRCHR if strchr() and
1604 strrchr() are available for string searching.
1606 d_strcoll (d_strcoll.U):
1607 This variable conditionally defines HAS_STRCOLL if strcoll() is
1608 available to compare strings using collating information.
1610 d_strctcpy (d_strctcpy.U):
1611 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1612 indicates to the C program that this C compiler knows how to copy
1615 d_strerrm (d_strerror.U):
1616 This variable holds what Strerrr is defined as to translate an error
1617 code condition into an error message string. It could be 'strerror'
1618 or a more complex macro emulating strrror with sys_errlist[], or the
1619 "unknown" string when both strerror and sys_errlist are missing.
1621 d_strerror (d_strerror.U):
1622 This variable conditionally defines HAS_STRERROR if strerror() is
1623 available to translate error numbers to strings.
1625 d_strftime (d_strftime.U):
1626 This variable conditionally defines the HAS_STRFTIME symbol, which
1627 indicates to the C program that the strftime() routine is available.
1629 d_strtod (d_strtod.U):
1630 This variable conditionally defines the HAS_STRTOD symbol, which
1631 indicates to the C program that the strtod() routine is available
1632 to provide better numeric string conversion than atof().
1634 d_strtol (d_strtol.U):
1635 This variable conditionally defines the HAS_STRTOL symbol, which
1636 indicates to the C program that the strtol() routine is available
1637 to provide better numeric string conversion than atoi() and friends.
1639 d_strtold (d_strtold.U):
1640 This variable conditionally defines the HAS_STRTOLD symbol, which
1641 indicates to the C program that the strtold() routine is available.
1643 d_strtoll (d_strtoll.U):
1644 This variable conditionally defines the HAS_STRTOLL symbol, which
1645 indicates to the C program that the strtoll() routine is available.
1647 d_strtoq (d_strtoq.U):
1648 This variable conditionally defines the HAS_STRTOQ symbol, which
1649 indicates to the C program that the strtoq() routine is available.
1651 d_strtoul (d_strtoul.U):
1652 This variable conditionally defines the HAS_STRTOUL symbol, which
1653 indicates to the C program that the strtoul() routine is available
1654 to provide conversion of strings to unsigned long.
1656 d_strtoull (d_strtoull.U):
1657 This variable conditionally defines the HAS_STRTOULL symbol, which
1658 indicates to the C program that the strtoull() routine is available.
1660 d_strtouq (d_strtouq.U):
1661 This variable conditionally defines the HAS_STRTOUQ symbol, which
1662 indicates to the C program that the strtouq() routine is available.
1664 d_strxfrm (d_strxfrm.U):
1665 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1666 available to transform strings.
1668 d_suidsafe (d_dosuid.U):
1669 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1670 if setuid scripts can be secure. This test looks in /dev/fd/.
1672 d_symlink (d_symlink.U):
1673 This variable conditionally defines the HAS_SYMLINK symbol, which
1674 indicates to the C program that the symlink() routine is available
1675 to create symbolic links.
1677 d_syscall (d_syscall.U):
1678 This variable conditionally defines HAS_SYSCALL if syscall() is
1679 available call arbitrary system calls.
1681 d_syscallproto (d_syscallproto.U):
1682 This variable conditionally defines the HAS_SYSCALL_PROTO symbol,
1683 which indicates to the C program that the system provides
1684 a prototype for the syscall() function. Otherwise, it is
1685 up to the program to supply one.
1687 d_sysconf (d_sysconf.U):
1688 This variable conditionally defines the HAS_SYSCONF symbol, which
1689 indicates to the C program that the sysconf() routine is available
1690 to determine system related limits and options.
1692 d_sysernlst (d_strerror.U):
1693 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1694 is available to translate error numbers to the symbolic name.
1696 d_syserrlst (d_strerror.U):
1697 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1698 available to translate error numbers to strings.
1700 d_system (d_system.U):
1701 This variable conditionally defines HAS_SYSTEM if system() is
1702 available to issue a shell command.
1704 d_tcgetpgrp (d_tcgtpgrp.U):
1705 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1706 indicates to the C program that the tcgetpgrp() routine is available.
1707 to get foreground process group ID.
1709 d_tcsetpgrp (d_tcstpgrp.U):
1710 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1711 indicates to the C program that the tcsetpgrp() routine is available
1712 to set foreground process group ID.
1714 d_telldir (d_readdir.U):
1715 This variable conditionally defines HAS_TELLDIR if telldir() is
1718 d_telldirproto (d_telldirproto.U):
1719 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1720 which indicates to the C program that the system provides
1721 a prototype for the telldir() function. Otherwise, it is
1722 up to the program to supply one.
1725 This variable conditionally defines the HAS_TIME symbol, which indicates
1726 that the time() routine exists. The time() routine is normaly
1727 provided on UNIX systems.
1729 d_times (d_times.U):
1730 This variable conditionally defines the HAS_TIMES symbol, which indicates
1731 that the times() routine exists. The times() routine is normaly
1732 provided on UNIX systems. You may have to include <sys/times.h>.
1734 d_truncate (d_truncate.U):
1735 This variable conditionally defines HAS_TRUNCATE if truncate() is
1736 available to truncate files.
1738 d_tzname (d_tzname.U):
1739 This variable conditionally defines HAS_TZNAME if tzname[] is
1740 available to access timezone names.
1742 d_u32align (d_u32align.U):
1743 This variable tells whether you must access character data
1744 through U32-aligned pointers.
1746 d_ualarm (d_ualarm.U):
1747 This variable conditionally defines the HAS_UALARM symbol, which
1748 indicates to the C program that the ualarm() routine is available.
1750 d_umask (d_umask.U):
1751 This variable conditionally defines the HAS_UMASK symbol, which
1752 indicates to the C program that the umask() routine is available.
1753 to set and get the value of the file creation mask.
1755 d_uname (d_gethname.U):
1756 This variable conditionally defines the HAS_UNAME symbol, which
1757 indicates to the C program that the uname() routine may be
1758 used to derive the host name.
1760 d_union_semun (d_union_semun.U):
1761 This variable conditionally defines HAS_UNION_SEMUN if the
1762 union semun is defined by including <sys/sem.h>.
1764 d_usleep (d_usleep.U):
1765 This variable conditionally defines HAS_USLEEP if usleep() is
1766 available to do high granularity sleeps.
1768 d_usleepproto (d_usleepproto.U):
1769 This variable conditionally defines the HAS_USLEEP_PROTO symbol,
1770 which indicates to the C program that the system provides
1771 a prototype for the usleep() function. Otherwise, it is
1772 up to the program to supply one.
1774 d_ustat (d_ustat.U):
1775 This variable conditionally defines HAS_USTAT if ustat() is
1776 available to query file system statistics by dev_t.
1778 d_vendorarch (vendorarch.U):
1779 This variable conditionally defined PERL_VENDORARCH.
1781 d_vendorbin (vendorbin.U):
1782 This variable conditionally defines PERL_VENDORBIN.
1784 d_vendorlib (vendorlib.U):
1785 This variable conditionally defines PERL_VENDORLIB.
1787 d_vfork (d_vfork.U):
1788 This variable conditionally defines the HAS_VFORK symbol, which
1789 indicates the vfork() routine is available.
1791 d_void_closedir (d_closedir.U):
1792 This variable conditionally defines VOID_CLOSEDIR if closedir()
1793 does not return a value.
1795 d_voidsig (d_voidsig.U):
1796 This variable conditionally defines VOIDSIG if this system
1797 declares "void (*signal(...))()" in signal.h. The old way was to
1798 declare it as "int (*signal(...))()".
1800 d_voidtty (i_sysioctl.U):
1801 This variable conditionally defines USE_IOCNOTTY to indicate that the
1802 ioctl() call with TIOCNOTTY should be used to void tty association.
1803 Otherwise (on USG probably), it is enough to close the standard file
1804 decriptors and do a setpgrp().
1806 d_volatile (d_volatile.U):
1807 This variable conditionally defines the HASVOLATILE symbol, which
1808 indicates to the C program that this C compiler knows about the
1809 volatile declaration.
1811 d_vprintf (d_vprintf.U):
1812 This variable conditionally defines the HAS_VPRINTF symbol, which
1813 indicates to the C program that the vprintf() routine is available
1814 to printf with a pointer to an argument list.
1816 d_wait4 (d_wait4.U):
1817 This variable conditionally defines the HAS_WAIT4 symbol, which
1818 indicates the wait4() routine is available.
1820 d_waitpid (d_waitpid.U):
1821 This variable conditionally defines HAS_WAITPID if waitpid() is
1822 available to wait for child process.
1824 d_wcstombs (d_wcstombs.U):
1825 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1826 indicates to the C program that the wcstombs() routine is available
1827 to convert wide character strings to multibyte strings.
1829 d_wctomb (d_wctomb.U):
1830 This variable conditionally defines the HAS_WCTOMB symbol, which
1831 indicates to the C program that the wctomb() routine is available
1832 to convert a wide character to a multibyte.
1834 d_writev (d_writev.U):
1835 This variable conditionally defines the HAS_WRITEV symbol, which
1836 indicates to the C program that the writev() routine is available.
1839 This variable conditionally defines the symbol XENIX, which alerts
1840 the C program that it runs under Xenix.
1843 This variable is used internally by Configure to determine the
1844 full pathname (if any) of the date program. After Configure runs,
1845 the value is reset to a plain "date" and is not useful.
1847 db_hashtype (i_db.U):
1848 This variable contains the type of the hash structure element
1849 in the <db.h> header file. In older versions of DB, it was
1850 int, while in newer ones it is u_int32_t.
1852 db_prefixtype (i_db.U):
1853 This variable contains the type of the prefix structure element
1854 in the <db.h> header file. In older versions of DB, it was
1855 int, while in newer ones it is size_t.
1857 db_version_major (i_db.U):
1858 This variable contains the major version number of
1859 Berkeley DB found in the <db.h> header file.
1861 db_version_minor (i_db.U):
1862 This variable contains the minor version number of
1863 Berkeley DB found in the <db.h> header file.
1864 For DB version 1 this is always 0.
1866 db_version_patch (i_db.U):
1867 This variable contains the patch version number of
1868 Berkeley DB found in the <db.h> header file.
1869 For DB version 1 this is always 0.
1871 defvoidused (voidflags.U):
1872 This variable contains the default value of the VOIDUSED symbol (15).
1874 direntrytype (i_dirent.U):
1875 This symbol is set to 'struct direct' or 'struct dirent' depending on
1876 whether dirent is available or not. You should use this pseudo type to
1877 portably declare your directory entries.
1880 This variable contains the extension that is to be used for the
1881 dynamically loaded modules that perl generaties.
1884 This variable contains the name of the dynamic loading file that
1885 will be used with the package.
1887 doublesize (doublesize.U):
1888 This variable contains the value of the DOUBLESIZE symbol, which
1889 indicates to the C program how many bytes there are in a double.
1891 drand01 (randfunc.U):
1892 Indicates the macro to be used to generate normalized
1893 random numbers. Uses randfunc, often divided by
1894 (double) (((unsigned long) 1 << randbits)) in order to
1895 normalize the result.
1896 In C programs, the macro 'Drand01' is mapped to drand01.
1898 dynamic_ext (Extensions.U):
1899 This variable holds a list of XS extension files we want to
1900 link dynamically into the package. It is used by Makefile.
1902 eagain (nblock_io.U):
1903 This variable bears the symbolic errno code set by read() when no
1904 data is present on the file and non-blocking I/O was enabled (otherwise,
1905 read() blocks naturally).
1908 This variable conditionally defines EBCDIC if this
1909 system uses EBCDIC encoding. Among other things, this
1910 means that the character ranges are not contiguous.
1914 This variable is used internally by Configure to determine the
1915 full pathname (if any) of the echo program. After Configure runs,
1916 the value is reset to a plain "echo" and is not useful.
1919 This variable is used internally by Configure to determine the
1920 full pathname (if any) of the egrep program. After Configure runs,
1921 the value is reset to a plain "egrep" and is not useful.
1924 This variable is defined but not used by Configure.
1925 The value is a plain '' and is not useful.
1928 When running under Eunice this variable contains a command which will
1929 convert a shell script to the proper form of text file for it to be
1930 executable by the shell. On other systems it is a no-op.
1933 This is an old synonym for _exe.
1936 This variable is used internally by Configure to determine the
1937 full pathname (if any) of the expr program. After Configure runs,
1938 the value is reset to a plain "expr" and is not useful.
1940 extensions (Extensions.U):
1941 This variable holds a list of all extension files (both XS and
1942 non-xs linked into the package. It is propagated to Config.pm
1943 and is typically used to test whether a particular extesion
1946 fflushall (fflushall.U):
1947 This symbol, if defined, tells that to flush
1948 all pending stdio output one must loop through all
1949 the stdio file handles stored in an array and fflush them.
1950 Note that if fflushNULL is defined, fflushall will not
1951 even be probed for and will be left undefined.
1953 fflushNULL (fflushall.U):
1954 This symbol, if defined, tells that fflush(NULL) does flush
1955 all pending stdio output.
1958 This variable is defined but not used by Configure.
1959 The value is a plain '' and is not useful.
1961 firstmakefile (Unix.U):
1962 This variable defines the first file searched by make. On unix,
1963 it is makefile (then Makefile). On case-insensitive systems,
1964 it might be something else. This is only used to deal with
1965 convoluted make depend tricks.
1968 This variable is defined but not used by Configure.
1969 The value is a plain '' and is not useful.
1971 fpossize (fpossize.U):
1972 This variable contains the size of a fpostype in bytes.
1974 fpostype (fpostype.U):
1975 This variable defines Fpos_t to be something like fpos_t, long,
1976 uint, or whatever type is used to declare file positions in libc.
1978 freetype (mallocsrc.U):
1979 This variable contains the return type of free(). It is usually
1980 void, but occasionally int.
1983 This variable contains the command used by Configure
1984 to copy files from the target host. Useful and available
1985 only during Perl build.
1986 The string ':' if not cross-compiling.
1989 This variable contains the full pathname to 'ar', whether or
1990 not the user has specified 'portability'. This is only used
1994 This variable contains the full pathname to 'csh', whether or
1995 not the user has specified 'portability'. This is only used
1996 in the compiled C program, and we assume that all systems which
1997 can share this executable will have the same full pathname to
2000 full_sed (Loc_sed.U):
2001 This variable contains the full pathname to 'sed', whether or
2002 not the user has specified 'portability'. This is only used
2003 in the compiled C program, and we assume that all systems which
2004 can share this executable will have the same full pathname to
2007 gccosandvers (gccvers.U):
2008 If GNU cc (gcc) is used, this variable the operating system and
2009 version used to compile the gcc. It is set to '' if not gcc,
2010 or if nothing useful can be parsed as the os version.
2012 gccversion (gccvers.U):
2013 If GNU cc (gcc) is used, this variable holds '1' or '2' to
2014 indicate whether the compiler is version 1 or 2. This is used in
2015 setting some of the default cflags. It is set to '' if not gcc.
2018 This variable contains the format string used for printing a Gid_t.
2020 gidsign (gidsign.U):
2021 This variable contains the signedness of a gidtype.
2022 1 for unsigned, -1 for signed.
2024 gidsize (gidsize.U):
2025 This variable contains the size of a gidtype in bytes.
2027 gidtype (gidtype.U):
2028 This variable defines Gid_t to be something like gid_t, int,
2029 ushort, or whatever type is used to declare the return type
2030 of getgid(). Typically, it is the type of group ids in the kernel.
2033 This variable holds the general path (space-separated) used to
2034 find libraries. It may contain directories that do not exist on
2035 this platform, libpth is the cleaned-up version.
2038 This variable is used internally by Configure to determine the
2039 full pathname (if any) of the grep program. After Configure runs,
2040 the value is reset to a plain "grep" and is not useful.
2043 This variable contains a command that produces the text of the
2044 /etc/group file. This is normally "cat /etc/group", but can be
2045 "ypcat group" when NIS is used.
2046 On some systems, such as os390, there may be no equivalent
2047 command, in which case this variable is unset.
2049 groupstype (groupstype.U):
2050 This variable defines Groups_t to be something like gid_t, int,
2051 ushort, or whatever type is used for the second argument to
2052 getgroups() and setgroups(). Usually, this is the same as
2053 gidtype (gid_t), but sometimes it isn't.
2056 This variable is used internally by Configure to determine the
2057 full pathname (if any) of the gzip program. After Configure runs,
2058 the value is reset to a plain "gzip" and is not useful.
2060 h_fcntl (h_fcntl.U):
2061 This is variable gets set in various places to tell i_fcntl that
2062 <fcntl.h> should be included.
2064 h_sysfile (h_sysfile.U):
2065 This is variable gets set in various places to tell i_sys_file that
2066 <sys/file.h> should be included.
2069 Gives the type of hints used for previous answers. May be one of
2070 "default", "recommended" or "previous".
2073 This variable contains a command that produces the text of the
2074 /etc/hosts file. This is normally "cat /etc/hosts", but can be
2075 "ypcat hosts" when NIS is used.
2076 On some systems, such as os390, there may be no equivalent
2077 command, in which case this variable is unset.
2080 This variable is the size of an I16 in bytes.
2083 This variable contains the C type used for Perl's I16.
2086 This variable is the size of an I32 in bytes.
2089 This variable contains the C type used for Perl's I32.
2092 This variable is the size of an I64 in bytes.
2095 This variable contains the C type used for Perl's I64.
2098 This variable is the size of an I8 in bytes.
2101 This variable contains the C type used for Perl's I8.
2103 i_arpainet (i_arpainet.U):
2104 This variable conditionally defines the I_ARPA_INET symbol,
2105 and indicates whether a C program should include <arpa/inet.h>.
2107 i_bsdioctl (i_sysioctl.U):
2108 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
2109 indicates to the C program that <sys/bsdioctl.h> exists and should
2113 This variable conditionally defines the I_DB symbol, and indicates
2114 whether a C program may include Berkeley's DB include file <db.h>.
2117 This variable conditionally defines the I_DBM symbol, which
2118 indicates to the C program that <dbm.h> exists and should
2121 i_dirent (i_dirent.U):
2122 This variable conditionally defines I_DIRENT, which indicates
2123 to the C program that it should include <dirent.h>.
2126 This variable conditionally defines the I_DLD symbol, which
2127 indicates to the C program that <dld.h> (GNU dynamic loading)
2128 exists and should be included.
2130 i_dlfcn (i_dlfcn.U):
2131 This variable conditionally defines the I_DLFCN symbol, which
2132 indicates to the C program that <dlfcn.h> exists and should
2135 i_fcntl (i_fcntl.U):
2136 This variable controls the value of I_FCNTL (which tells
2137 the C program to include <fcntl.h>).
2139 i_float (i_float.U):
2140 This variable conditionally defines the I_FLOAT symbol, and indicates
2141 whether a C program may include <float.h> to get symbols like DBL_MAX
2142 or DBL_MIN, i.e. machine dependent floating point values.
2145 This variable conditionally defines the I_GDBM symbol, which
2146 indicates to the C program that <gdbm.h> exists and should
2150 This variable conditionally defines the I_GRP symbol, and indicates
2151 whether a C program should include <grp.h>.
2153 i_iconv (i_iconv.U):
2154 This variable conditionally defines the I_ICONV symbol, and indicates
2155 whether a C program should include <iconv.h>.
2157 i_ieeefp (i_ieeefp.U):
2158 This variable conditionally defines the I_IEEEFP symbol, and indicates
2159 whether a C program should include <ieeefp.h>.
2161 i_inttypes (i_inttypes.U):
2162 This variable conditionally defines the I_INTTYPES symbol,
2163 and indicates whether a C program should include <inttypes.h>.
2165 i_libutil (i_libutil.U):
2166 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2167 whether a C program should include <libutil.h>.
2169 i_limits (i_limits.U):
2170 This variable conditionally defines the I_LIMITS symbol, and indicates
2171 whether a C program may include <limits.h> to get symbols like WORD_BIT
2174 i_locale (i_locale.U):
2175 This variable conditionally defines the I_LOCALE symbol,
2176 and indicates whether a C program should include <locale.h>.
2178 i_machcthr (i_machcthr.U):
2179 This variable conditionally defines the I_MACH_CTHREADS symbol,
2180 and indicates whether a C program should include <mach/cthreads.h>.
2182 i_malloc (i_malloc.U):
2183 This variable conditionally defines the I_MALLOC symbol, and indicates
2184 whether a C program should include <malloc.h>.
2187 This variable conditionally defines the I_MATH symbol, and indicates
2188 whether a C program may include <math.h>.
2190 i_memory (i_memory.U):
2191 This variable conditionally defines the I_MEMORY symbol, and indicates
2192 whether a C program should include <memory.h>.
2194 i_mntent (i_mntent.U):
2195 This variable conditionally defines the I_MNTENT symbol, and indicates
2196 whether a C program should include <mntent.h>.
2199 This variable conditionally defines the I_NDBM symbol, which
2200 indicates to the C program that <ndbm.h> exists and should
2203 i_netdb (i_netdb.U):
2204 This variable conditionally defines the I_NETDB symbol, and indicates
2205 whether a C program should include <netdb.h>.
2207 i_neterrno (i_neterrno.U):
2208 This variable conditionally defines the I_NET_ERRNO symbol, which
2209 indicates to the C program that <net/errno.h> exists and should
2212 i_netinettcp (i_netinettcp.U):
2213 This variable conditionally defines the I_NETINET_TCP symbol,
2214 and indicates whether a C program should include <netinet/tcp.h>.
2217 This variable conditionally defines I_NETINET_IN, which indicates
2218 to the C program that it should include <netinet/in.h>. Otherwise,
2219 you may try <sys/in.h>.
2222 This variable conditionally defines the I_POLL symbol, and indicates
2223 whether a C program should include <poll.h>.
2226 This variable conditionally defines the I_PROT symbol, and indicates
2227 whether a C program should include <prot.h>.
2229 i_pthread (i_pthread.U):
2230 This variable conditionally defines the I_PTHREAD symbol,
2231 and indicates whether a C program should include <pthread.h>.
2234 This variable conditionally defines I_PWD, which indicates
2235 to the C program that it should include <pwd.h>.
2237 i_rpcsvcdbm (i_dbm.U):
2238 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2239 indicates to the C program that <rpcsvc/dbm.h> exists and should
2240 be included. Some System V systems might need this instead of <dbm.h>.
2243 This variable conditionally defines the I_SFIO symbol,
2244 and indicates whether a C program should include <sfio.h>.
2246 i_sgtty (i_termio.U):
2247 This variable conditionally defines the I_SGTTY symbol, which
2248 indicates to the C program that it should include <sgtty.h> rather
2251 i_shadow (i_shadow.U):
2252 This variable conditionally defines the I_SHADOW symbol, and indicates
2253 whether a C program should include <shadow.h>.
2255 i_socks (i_socks.U):
2256 This variable conditionally defines the I_SOCKS symbol, and indicates
2257 whether a C program should include <socks.h>.
2259 i_stdarg (i_varhdr.U):
2260 This variable conditionally defines the I_STDARG symbol, which
2261 indicates to the C program that <stdarg.h> exists and should
2264 i_stddef (i_stddef.U):
2265 This variable conditionally defines the I_STDDEF symbol, which
2266 indicates to the C program that <stddef.h> exists and should
2269 i_stdlib (i_stdlib.U):
2270 This variable conditionally defines the I_STDLIB symbol, which
2271 indicates to the C program that <stdlib.h> exists and should
2274 i_string (i_string.U):
2275 This variable conditionally defines the I_STRING symbol, which
2276 indicates that <string.h> should be included rather than <strings.h>.
2278 i_sunmath (i_sunmath.U):
2279 This variable conditionally defines the I_SUNMATH symbol, and indicates
2280 whether a C program should include <sunmath.h>.
2282 i_sysaccess (i_sysaccess.U):
2283 This variable conditionally defines the I_SYS_ACCESS symbol,
2284 and indicates whether a C program should include <sys/access.h>.
2286 i_sysdir (i_sysdir.U):
2287 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2288 whether a C program should include <sys/dir.h>.
2290 i_sysfile (i_sysfile.U):
2291 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2292 whether a C program should include <sys/file.h> to get R_OK and friends.
2294 i_sysfilio (i_sysioctl.U):
2295 This variable conditionally defines the I_SYS_FILIO symbol, which
2296 indicates to the C program that <sys/filio.h> exists and should
2297 be included in preference to <sys/ioctl.h>.
2300 This variable conditionally defines I_SYS_IN, which indicates
2301 to the C program that it should include <sys/in.h> instead of
2304 i_sysioctl (i_sysioctl.U):
2305 This variable conditionally defines the I_SYS_IOCTL symbol, which
2306 indicates to the C program that <sys/ioctl.h> exists and should
2309 i_syslog (i_syslog.U):
2310 This variable conditionally defines the I_SYSLOG symbol,
2311 and indicates whether a C program should include <syslog.h>.
2313 i_sysmman (i_sysmman.U):
2314 This variable conditionally defines the I_SYS_MMAN symbol, and
2315 indicates whether a C program should include <sys/mman.h>.
2317 i_sysmode (i_sysmode.U):
2318 This variable conditionally defines the I_SYSMODE symbol,
2319 and indicates whether a C program should include <sys/mode.h>.
2321 i_sysmount (i_sysmount.U):
2322 This variable conditionally defines the I_SYSMOUNT symbol,
2323 and indicates whether a C program should include <sys/mount.h>.
2325 i_sysndir (i_sysndir.U):
2326 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2327 whether a C program should include <sys/ndir.h>.
2329 i_sysparam (i_sysparam.U):
2330 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2331 whether a C program should include <sys/param.h>.
2333 i_sysresrc (i_sysresrc.U):
2334 This variable conditionally defines the I_SYS_RESOURCE symbol,
2335 and indicates whether a C program should include <sys/resource.h>.
2337 i_syssecrt (i_syssecrt.U):
2338 This variable conditionally defines the I_SYS_SECURITY symbol,
2339 and indicates whether a C program should include <sys/security.h>.
2341 i_sysselct (i_sysselct.U):
2342 This variable conditionally defines I_SYS_SELECT, which indicates
2343 to the C program that it should include <sys/select.h> in order to
2344 get the definition of struct timeval.
2346 i_syssockio (i_sysioctl.U):
2347 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2348 C program that socket ioctl codes may be found in <sys/sockio.h>
2349 instead of <sys/ioctl.h>.
2351 i_sysstat (i_sysstat.U):
2352 This variable conditionally defines the I_SYS_STAT symbol,
2353 and indicates whether a C program should include <sys/stat.h>.
2355 i_sysstatfs (i_sysstatfs.U):
2356 This variable conditionally defines the I_SYSSTATFS symbol,
2357 and indicates whether a C program should include <sys/statfs.h>.
2359 i_sysstatvfs (i_sysstatvfs.U):
2360 This variable conditionally defines the I_SYSSTATVFS symbol,
2361 and indicates whether a C program should include <sys/statvfs.h>.
2363 i_systime (i_time.U):
2364 This variable conditionally defines I_SYS_TIME, which indicates
2365 to the C program that it should include <sys/time.h>.
2367 i_systimek (i_time.U):
2368 This variable conditionally defines I_SYS_TIME_KERNEL, which
2369 indicates to the C program that it should include <sys/time.h>
2370 with KERNEL defined.
2372 i_systimes (i_systimes.U):
2373 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2374 whether a C program should include <sys/times.h>.
2376 i_systypes (i_systypes.U):
2377 This variable conditionally defines the I_SYS_TYPES symbol,
2378 and indicates whether a C program should include <sys/types.h>.
2380 i_sysuio (i_sysuio.U):
2381 This variable conditionally defines the I_SYSUIO symbol, and indicates
2382 whether a C program should include <sys/uio.h>.
2384 i_sysun (i_sysun.U):
2385 This variable conditionally defines I_SYS_UN, which indicates
2386 to the C program that it should include <sys/un.h> to get UNIX
2387 domain socket definitions.
2389 i_sysutsname (i_sysutsname.U):
2390 This variable conditionally defines the I_SYSUTSNAME symbol,
2391 and indicates whether a C program should include <sys/utsname.h>.
2393 i_sysvfs (i_sysvfs.U):
2394 This variable conditionally defines the I_SYSVFS symbol,
2395 and indicates whether a C program should include <sys/vfs.h>.
2397 i_syswait (i_syswait.U):
2398 This variable conditionally defines I_SYS_WAIT, which indicates
2399 to the C program that it should include <sys/wait.h>.
2401 i_termio (i_termio.U):
2402 This variable conditionally defines the I_TERMIO symbol, which
2403 indicates to the C program that it should include <termio.h> rather
2406 i_termios (i_termio.U):
2407 This variable conditionally defines the I_TERMIOS symbol, which
2408 indicates to the C program that the POSIX <termios.h> file is
2412 This variable conditionally defines I_TIME, which indicates
2413 to the C program that it should include <time.h>.
2415 i_unistd (i_unistd.U):
2416 This variable conditionally defines the I_UNISTD symbol, and indicates
2417 whether a C program should include <unistd.h>.
2419 i_ustat (i_ustat.U):
2420 This variable conditionally defines the I_USTAT symbol, and indicates
2421 whether a C program should include <ustat.h>.
2423 i_utime (i_utime.U):
2424 This variable conditionally defines the I_UTIME symbol, and indicates
2425 whether a C program should include <utime.h>.
2427 i_values (i_values.U):
2428 This variable conditionally defines the I_VALUES symbol, and indicates
2429 whether a C program may include <values.h> to get symbols like MAXLONG
2432 i_varargs (i_varhdr.U):
2433 This variable conditionally defines I_VARARGS, which indicates
2434 to the C program that it should include <varargs.h>.
2436 i_varhdr (i_varhdr.U):
2437 Contains the name of the header to be included to get va_dcl definition.
2438 Typically one of varargs.h or stdarg.h.
2440 i_vfork (i_vfork.U):
2441 This variable conditionally defines the I_VFORK symbol, and indicates
2442 whether a C program should include vfork.h.
2444 ignore_versioned_solibs (libs.U):
2445 This variable should be non-empty if non-versioned shared
2446 libraries (libfoo.so.x.y) are to be ignored (because they
2447 cannot be linked against).
2449 inc_version_list (inc_version_list.U):
2450 This variable specifies the list of subdirectories in over
2451 which perl.c:incpush() and lib/lib.pm will automatically
2452 search when adding directories to @INC. The elements in
2453 the list are separated by spaces. This is only useful
2454 if you have a perl library directory tree structured like the
2455 default one. See INSTALL for how this works. The versioned
2456 site_perl directory was introduced in 5.005, so that is the
2457 lowest possible value.
2459 inc_version_list_init (inc_version_list.U):
2460 This variable holds the same list as inc_version_list, but
2461 each item is enclosed in double quotes and separated by commas,
2462 suitable for use in the PERL_INC_VERSION_LIST initialization.
2465 This variable must preceed the normal include path to get hte
2466 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2467 Value can be "" or "/bsd43" on mips.
2470 This variable is defined but not used by Configure.
2471 The value is a plain '' and is not useful.
2473 installarchlib (archlib.U):
2474 This variable is really the same as archlibexp but may differ on
2475 those systems using AFS. For extra portability, only this variable
2476 should be used in makefiles.
2479 This variable is the same as binexp unless AFS is running in which case
2480 the user is explicitely prompted for it. This variable should always
2481 be used in your makefiles for maximum portability.
2483 installman1dir (man1dir.U):
2484 This variable is really the same as man1direxp, unless you are using
2485 AFS in which case it points to the read/write location whereas
2486 man1direxp only points to the read-only access location. For extra
2487 portability, you should only use this variable within your makefiles.
2489 installman3dir (man3dir.U):
2490 This variable is really the same as man3direxp, unless you are using
2491 AFS in which case it points to the read/write location whereas
2492 man3direxp only points to the read-only access location. For extra
2493 portability, you should only use this variable within your makefiles.
2495 installprefix (installprefix.U):
2496 This variable holds the name of the directory below which
2497 "make install" will install the package. For most users, this
2498 is the same as prefix. However, it is useful for
2499 installing the software into a different (usually temporary)
2500 location after which it can be bundled up and moved somehow
2501 to the final location specified by prefix.
2503 installprefixexp (installprefix.U):
2504 This variable holds the full absolute path of installprefix
2505 with all ~-expansion done.
2507 installprivlib (privlib.U):
2508 This variable is really the same as privlibexp but may differ on
2509 those systems using AFS. For extra portability, only this variable
2510 should be used in makefiles.
2512 installscript (scriptdir.U):
2513 This variable is usually the same as scriptdirexp, unless you are on
2514 a system running AFS, in which case they may differ slightly. You
2515 should always use this variable within your makefiles for portability.
2517 installsitearch (sitearch.U):
2518 This variable is really the same as sitearchexp but may differ on
2519 those systems using AFS. For extra portability, only this variable
2520 should be used in makefiles.
2522 installsitebin (sitebin.U):
2523 This variable is usually the same as sitebinexp, unless you are on
2524 a system running AFS, in which case they may differ slightly. You
2525 should always use this variable within your makefiles for portability.
2527 installsitelib (sitelib.U):
2528 This variable is really the same as sitelibexp but may differ on
2529 those systems using AFS. For extra portability, only this variable
2530 should be used in makefiles.
2532 installstyle (installstyle.U):
2533 This variable describes the "style" of the perl installation.
2534 This is intended to be useful for tools that need to
2535 manipulate entire perl distributions. Perl itself doesn't use
2536 this to find its libraries -- the library directories are
2537 stored directly in Config.pm. Currently, there are only two
2538 styles: "lib" and "lib/perl5". The default library locations
2539 (e.g. privlib, sitelib) are either $prefix/lib or
2540 $prefix/lib/perl5. The former is useful if $prefix is a
2541 directory dedicated to perl (e.g. /opt/perl), while the latter
2542 is useful if $prefix is shared by many packages, e.g. if
2544 This may later be extended to include other information, so
2545 be careful with pattern-matching on the results.
2546 For compatibility with perl5.005 and earlier, the default
2547 setting is based on whether or not $prefix contains the string
2550 installusrbinperl (instubperl.U):
2551 This variable tells whether Perl should be installed also as
2552 /usr/bin/perl in addition to
2555 installvendorarch (vendorarch.U):
2556 This variable is really the same as vendorarchexp but may differ on
2557 those systems using AFS. For extra portability, only this variable
2558 should be used in makefiles.
2560 installvendorbin (vendorbin.U):
2561 This variable is really the same as vendorbinexp but may differ on
2562 those systems using AFS. For extra portability, only this variable
2563 should be used in makefiles.
2565 installvendorlib (vendorlib.U):
2566 This variable is really the same as vendorlibexp but may differ on
2567 those systems using AFS. For extra portability, only this variable
2568 should be used in makefiles.
2570 intsize (intsize.U):
2571 This variable contains the value of the INTSIZE symbol, which
2572 indicates to the C program how many bytes there are in an int.
2574 issymlink (issymlink.U):
2575 This variable holds the test command to test for a symbolic link
2576 (if they are supported). Typical values include 'test -h' and
2579 ivdformat (perlxvf.U):
2580 This variable contains the format string used for printing
2581 a Perl IV as a signed decimal integer.
2584 This variable is the size of an IV in bytes.
2587 This variable contains the C type used for Perl's IV.
2589 known_extensions (Extensions.U):
2590 This variable holds a list of all XS extensions included in
2594 This variable is defined but not used by Configure.
2595 The value is a plain '' and is not useful.
2598 This variable indicates the program to be used to link
2599 libraries for dynamic loading. On some systems, it is 'ld'.
2600 On ELF systems, it should be $cc. Mostly, we'll try to respect
2601 the hint file setting.
2603 lddlflags (dlsrc.U):
2604 This variable contains any special flags that might need to be
2605 passed to $ld to create a shared library suitable for dynamic
2606 loading. It is up to the makefile to use it. For hpux, it
2607 should be '-b'. For sunos 4.1, it is empty.
2609 ldflags (ccflags.U):
2610 This variable contains any additional C loader flags desired by
2611 the user. It is up to the Makefile to use this.
2613 ldflags_uselargefiles (uselfs.U):
2614 This variable contains the loader flags needed by large file builds
2615 and added to ldflags by hints files.
2617 ldlibpthname (libperl.U):
2618 This variable holds the name of the shared library
2619 search path, often LD_LIBRARY_PATH. To get an empty
2620 string, the hints file must set this to 'none'.
2623 This variable is used internally by Configure to determine the
2624 full pathname (if any) of the less program. After Configure runs,
2625 the value is reset to a plain "less" and is not useful.
2628 This is an old synonym for _a.
2631 This variable contains the location of the C library.
2633 libperl (libperl.U):
2634 The perl executable is obtained by linking perlmain.c with
2635 libperl, any static extensions (usually just DynaLoader),
2636 and any other libraries needed on this system. libperl
2637 is usually libperl.a, but can also be libperl.so.xxx if
2638 the user wishes to build a perl executable with a shared
2642 This variable holds the general path (space-separated) used to find
2643 libraries. It is intended to be used by other units.
2646 This variable holds the additional libraries we want to use.
2647 It is up to the Makefile to deal with it.
2650 This variable holds the directory names aka dirnames of the libraries
2651 we found and accepted, duplicates are removed.
2654 This variable holds the filenames aka basenames of the libraries
2655 we found and accepted.
2658 This variable holds the full pathnames of the libraries
2659 we found and accepted.
2662 This variable holds the directory names probed for libraries.
2664 libswanted (Myinit.U):
2665 This variable holds a list of all the libraries we want to
2666 search. The order is chosen to pick up the c library
2667 ahead of ucb or bsd libraries for SVR4.
2669 libswanted_uselargefiles (uselfs.U):
2670 This variable contains the libraries needed by large file builds
2671 and added to ldflags by hints files. It is a space separated list
2672 of the library names without the "lib" prefix or any suffix, just
2676 This variable is defined but not used by Configure.
2677 The value is a plain '' and is not useful.
2680 This variable is defined but not used by Configure.
2681 The value is a plain '' and is not useful.
2683 lkflags (ccflags.U):
2684 This variable contains any additional C partial linker flags desired by
2685 the user. It is up to the Makefile to use this.
2688 This variable is used internally by Configure to determine the
2689 full pathname (if any) of the ln program. After Configure runs,
2690 the value is reset to a plain "ln" and is not useful.
2693 This variable holds the name of the command to make
2694 symbolic links (if they are supported). It can be used
2695 in the Makefile. It is either 'ln -s' or 'ln'
2697 locincpth (ccflags.U):
2698 This variable contains a list of additional directories to be
2699 searched by the compiler. The appropriate '-I' directives will
2700 be added to ccflags. This is intended to simplify setting
2701 local directories from the Configure command line.
2702 It's not much, but it parallels the loclibpth stuff in libpth.U.
2704 loclibpth (libpth.U):
2705 This variable holds the paths (space-separated) used to find local
2706 libraries. It is prepended to libpth, and is intended to be easily
2707 set from the command line.
2709 longdblsize (d_longdbl.U):
2710 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2711 indicates to the C program how many bytes there are in a long double,
2712 if this system supports long doubles.
2714 longlongsize (d_longlong.U):
2715 This variable contains the value of the LONGLONGSIZE symbol, which
2716 indicates to the C program how many bytes there are in a long long,
2717 if this system supports long long.
2719 longsize (intsize.U):
2720 This variable contains the value of the LONGSIZE symbol, which
2721 indicates to the C program how many bytes there are in a long.
2724 This variable is defined but not used by Configure.
2725 The value is a plain '' and is not useful.
2728 This variable is defined but not used by Configure.
2729 The value is a plain '' and is not useful.
2732 This variable is used internally by Configure to determine the
2733 full pathname (if any) of the ls program. After Configure runs,
2734 the value is reset to a plain "ls" and is not useful.
2736 lseeksize (lseektype.U):
2737 This variable defines lseektype to be something like off_t, long,
2738 or whatever type is used to declare lseek offset's type in the
2739 kernel (which also appears to be lseek's return type).
2741 lseektype (lseektype.U):
2742 This variable defines lseektype to be something like off_t, long,
2743 or whatever type is used to declare lseek offset's type in the
2744 kernel (which also appears to be lseek's return type).
2747 This variable is defined but not used by Configure.
2748 The value is a plain '' and is not useful.
2751 This variable is defined but not used by Configure.
2752 The value is a plain '' and is not useful.
2755 This variable is used internally by Configure to determine the
2756 full pathname (if any) of the make program. After Configure runs,
2757 the value is reset to a plain "make" and is not useful.
2759 make_set_make (make.U):
2760 Some versions of 'make' set the variable MAKE. Others do not.
2761 This variable contains the string to be included in Makefile.SH
2762 so that MAKE is set if needed, and not if not needed.
2763 Possible values are:
2764 make_set_make='#' # If your make program handles this for you,
2765 make_set_make="MAKE=$make" # if it doesn't.
2766 I used a comment character so that we can distinguish a
2767 'set' value (from a previous config.sh or Configure '-D' option)
2768 from an uncomputed value.
2770 mallocobj (mallocsrc.U):
2771 This variable contains the name of the malloc.o that this package
2772 generates, if that malloc.o is preferred over the system malloc.
2773 Otherwise the value is null. This variable is intended for generating
2774 Makefiles. See mallocsrc.
2776 mallocsrc (mallocsrc.U):
2777 This variable contains the name of the malloc.c that comes with
2778 the package, if that malloc.c is preferred over the system malloc.
2779 Otherwise the value is null. This variable is intended for generating
2782 malloctype (mallocsrc.U):
2783 This variable contains the kind of ptr returned by malloc and realloc.
2785 man1dir (man1dir.U):
2786 This variable contains the name of the directory in which manual
2787 source pages are to be put. It is the responsibility of the
2788 Makefile.SH to get the value of this into the proper command.
2789 You must be prepared to do the ~name expansion yourself.
2791 man1direxp (man1dir.U):
2792 This variable is the same as the man1dir variable, but is filename
2793 expanded at configuration time, for convenient use in makefiles.
2795 man1ext (man1dir.U):
2796 This variable contains the extension that the manual page should
2797 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2800 man3dir (man3dir.U):
2801 This variable contains the name of the directory in which manual
2802 source pages are to be put. It is the responsibility of the
2803 Makefile.SH to get the value of this into the proper command.
2804 You must be prepared to do the ~name expansion yourself.
2806 man3direxp (man3dir.U):
2807 This variable is the same as the man3dir variable, but is filename
2808 expanded at configuration time, for convenient use in makefiles.
2810 man3ext (man3dir.U):
2811 This variable contains the extension that the manual page should
2812 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2816 This variable is used internally by Configure to determine the
2817 full pathname (if any) of the Mcc program. After Configure runs,
2818 the value is reset to a plain "Mcc" and is not useful.
2820 mips_type (usrinc.U):
2821 This variable holds the environment type for the mips system.
2822 Possible values are "BSD 4.3" and "System V".
2825 This variable is used internally by Configure to determine the
2826 full pathname (if any) of the mkdir program. After Configure runs,
2827 the value is reset to a plain "mkdir" and is not useful.
2829 mmaptype (d_mmap.U):
2830 This symbol contains the type of pointer returned by mmap()
2831 (and simultaneously the type of the first argument).
2832 It can be 'void *' or 'caddr_t'.
2834 modetype (modetype.U):
2835 This variable defines modetype to be something like mode_t,
2836 int, unsigned short, or whatever type is used to declare file
2837 modes for system calls.
2840 This variable is used internally by Configure to determine the
2841 full pathname (if any) of the more program. After Configure runs,
2842 the value is reset to a plain "more" and is not useful.
2844 multiarch (multiarch.U):
2845 This variable conditionally defines the MULTIARCH symbol
2846 which signifies the presence of multiplatform files.
2847 This is normally set by hints files.
2850 This variable is defined but not used by Configure.
2851 The value is a plain '' and is not useful.
2853 myarchname (archname.U):
2854 This variable holds the architecture name computed by Configure in
2855 a previous run. It is not intended to be perused by any user and
2856 should never be set in a hint file.
2858 mydomain (myhostname.U):
2859 This variable contains the eventual value of the MYDOMAIN symbol,
2860 which is the domain of the host the program is going to run on.
2861 The domain must be appended to myhostname to form a complete host name.
2862 The dot comes with mydomain, and need not be supplied by the program.
2864 myhostname (myhostname.U):
2865 This variable contains the eventual value of the MYHOSTNAME symbol,
2866 which is the name of the host the program is going to run on.
2867 The domain is not kept with hostname, but must be gotten from mydomain.
2868 The dot comes with mydomain, and need not be supplied by the program.
2870 myuname (Oldconfig.U):
2871 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2872 pseudo variables assignments in the output are stripped, thank you. The
2873 whole thing is then lower-cased.
2876 This variable contains the '-n' flag if that is what causes the echo
2877 command to suppress newline. Otherwise it is null. Correct usage is
2878 $echo $n "prompt for a question: $c".
2880 need_va_copy (need_va_copy.U):
2881 This symbol, if defined, indicates that the system stores
2882 the variable argument list datatype, va_list, in a format
2883 that cannot be copied by simple assignment, so that some
2884 other means must be used when copying is required.
2885 As such systems vary in their provision (or non-provision)
2886 of copying mechanisms, handy.h defines a platform-
2887 independent macro, Perl_va_copy(src, dst), to do the job.
2889 netdb_hlen_type (netdbtype.U):
2890 This variable holds the type used for the 2nd argument to
2891 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2892 This is only useful if you have gethostbyaddr(), naturally.
2894 netdb_host_type (netdbtype.U):
2895 This variable holds the type used for the 1st argument to
2896 gethostbyaddr(). Usually, this is char * or void *, possibly
2897 with or without a const prefix.
2898 This is only useful if you have gethostbyaddr(), naturally.
2900 netdb_name_type (netdbtype.U):
2901 This variable holds the type used for the argument to
2902 gethostbyname(). Usually, this is char * or const char *.
2903 This is only useful if you have gethostbyname(), naturally.
2905 netdb_net_type (netdbtype.U):
2906 This variable holds the type used for the 1st argument to
2907 getnetbyaddr(). Usually, this is int or long.
2908 This is only useful if you have getnetbyaddr(), naturally.
2911 This variable is used internally by Configure to determine the
2912 full pathname (if any) of the nm program. After Configure runs,
2913 the value is reset to a plain "nm" and is not useful.
2916 This variable holds the options that may be necessary for nm.
2918 nm_so_opt (usenm.U):
2919 This variable holds the options that may be necessary for nm
2920 to work on a shared library but that can not be used on an
2921 archive library. Currently, this is only used by Linux, where
2922 nm --dynamic is *required* to get symbols from an ELF library which
2923 has been stripped, but nm --dynamic is *fatal* on an archive library.
2924 Maybe Linux should just always set usenm=false.
2926 nonxs_ext (Extensions.U):
2927 This variable holds a list of all non-xs extensions included
2928 in the package. All of them will be built.
2931 This variable is used internally by Configure to determine the
2932 full pathname (if any) of the nroff program. After Configure runs,
2933 the value is reset to a plain "nroff" and is not useful.
2935 nveformat (perlxvf.U):
2936 This variable contains the format string used for printing
2937 a Perl NV using %e-ish floating point format.
2939 nvEUformat (perlxvf.U):
2940 This variable contains the format string used for printing
2941 a Perl NV using %E-ish floating point format.
2943 nvfformat (perlxvf.U):
2944 This variable confains the format string used for printing
2945 a Perl NV using %f-ish floating point format.
2947 nvFUformat (perlxvf.U):
2948 This variable confains the format string used for printing
2949 a Perl NV using %F-ish floating point format.
2951 nvgformat (perlxvf.U):
2952 This variable contains the format string used for printing
2953 a Perl NV using %g-ish floating point format.
2955 nvGUformat (perlxvf.U):
2956 This variable contains the format string used for printing
2957 a Perl NV using %G-ish floating point format.
2960 This variable is the size of an NV in bytes.
2963 This variable contains the C type used for Perl's NV.
2965 o_nonblock (nblock_io.U):
2966 This variable bears the symbol value to be used during open() or fcntl()
2967 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2968 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2969 but that is only supported by some devices.
2972 This is an old synonym for _o.
2974 old_pthread_create_joinable (d_pthrattrj.U):
2975 This variable defines the constant to use for creating joinable
2976 (aka undetached) pthreads. Unused if pthread.h defines
2977 PTHREAD_CREATE_JOINABLE. If used, possible values are
2978 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2980 optimize (ccflags.U):
2981 This variable contains any optimizer/debugger flag that should be used.
2982 It is up to the Makefile to use it.
2984 orderlib (orderlib.U):
2985 This variable is "true" if the components of libraries must be ordered
2986 (with `lorder $* | tsort`) before placing them in an archive. Set to
2987 "false" if ranlib or ar can generate random libraries.
2989 osname (Oldconfig.U):
2990 This variable contains the operating system name (e.g. sunos,
2991 solaris, hpux, etc.). It can be useful later on for setting
2992 defaults. Any spaces are replaced with underscores. It is set
2993 to a null string if we can't figure it out.
2995 osvers (Oldconfig.U):
2996 This variable contains the operating system version (e.g.
2997 4.1.3, 5.2, etc.). It is primarily used for helping select
2998 an appropriate hints file, but might be useful elsewhere for
2999 setting defaults. It is set to '' if we can't figure it out.
3000 We try to be flexible about how much of the version number
3001 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
3002 same for this package, hints files might just be os_4.0 or
3003 os_4.1, etc., not keeping separate files for each little release.
3005 otherlibdirs (otherlibdirs.U):
3006 This variable contains a colon-separated set of paths for the perl
3007 binary to search for additional library files or modules.
3008 These directories will be tacked to the end of @INC.
3009 Perl will automatically search below each path for version-
3010 and architecture-specific directories. See inc_version_list
3012 A value of ' ' means 'none' and is used to preserve this value
3013 for the next run through Configure.
3015 package (package.U):
3016 This variable contains the name of the package being constructed.
3017 It is primarily intended for the use of later Configure units.
3020 This variable contains the name of the preferred pager on the system.
3021 Usual values are (the full pathnames of) more, less, pg, or cat.
3024 This variable contains a command that produces the text of the
3025 /etc/passwd file. This is normally "cat /etc/passwd", but can be
3026 "ypcat passwd" when NIS is used.
3027 On some systems, such as os390, there may be no equivalent
3028 command, in which case this variable is unset.
3030 patchlevel (patchlevel.U):
3031 The patchlevel level of this package.
3032 The value of patchlevel comes from the patchlevel.h file.
3033 In a version number such as 5.6.1, this is the "6".
3034 In patchlevel.h, this is referred to as "PERL_VERSION".
3037 This is an old synonym for p_ in Head.U, the character
3038 used to separate elements in the command shell search PATH.
3041 This variable contains the full path (if any) to a previously
3042 installed perl5.005 or later suitable for running the script
3043 to determine inc_version_list.
3046 This variable is defined but not used by Configure.
3047 The value is a plain '' and is not useful.
3049 perl_patchlevel (patchlevel.U):
3050 This is the Perl patch level, a numeric change identifier,
3051 as defined by whichever source code maintenance system
3052 is used to maintain the patches; currently Perforce.
3053 It does not correlate with the Perl version numbers or
3054 the maintenance versus development dichotomy except
3055 by also being increasing.
3057 PERL_REVISION (Oldsyms.U):
3058 In a Perl version number such as 5.6.2, this is the 5.
3059 This value is manually set in patchlevel.h
3061 PERL_SUBVERSION (Oldsyms.U):
3062 In a Perl version number such as 5.6.2, this is the 2.
3063 Values greater than 50 represent potentially unstable
3064 development subversions.
3065 This value is manually set in patchlevel.h
3067 PERL_VERSION (Oldsyms.U):
3068 In a Perl version number such as 5.6.2, this is the 6.
3069 This value is manually set in patchlevel.h
3071 perladmin (perladmin.U):
3072 Electronic mail address of the perl5 administrator.
3075 The list of libraries needed by Perl only (any libraries needed
3076 by extensions only will by dropped, if using dynamic loading).
3078 perlpath (perlpath.U):
3079 This variable contains the eventual value of the PERLPATH symbol,
3080 which contains the name of the perl interpreter to be used in
3081 shell scripts and in the "eval 'exec'" idiom.
3084 This variable is used internally by Configure to determine the
3085 full pathname (if any) of the pg program. After Configure runs,
3086 the value is reset to a plain "pg" and is not useful.
3088 phostname (myhostname.U):
3089 This variable contains the eventual value of the PHOSTNAME symbol,
3090 which is a command that can be fed to popen() to get the host name.
3091 The program should probably not presume that the domain is or isn't
3094 pidtype (pidtype.U):
3095 This variable defines PIDTYPE to be something like pid_t, int,
3096 ushort, or whatever type is used to declare process ids in the kernel.
3099 Holds the private path used by Configure to find out the libraries.
3100 Its value is prepend to libpth. This variable takes care of special
3101 machines, like the mips. Usually, it should be empty.
3103 pm_apiversion (xs_apiversion.U):
3104 This variable contains the version of the oldest perl
3105 compatible with the present perl. (That is, pure perl modules
3106 written for $pm_apiversion will still work for the current
3107 version). perl.c:incpush() and lib/lib.pm will automatically
3108 search in $sitelib for older directories across major versions
3109 back to pm_apiversion. This is only useful if you have a perl
3110 library directory tree structured like the default one. The
3111 versioned site_perl library was introduced in 5.005, so that's
3112 the default setting for this variable. It's hard to imagine
3113 it changing before Perl6. It is included here for symmetry
3114 with xs_apiveprsion -- the searching algorithms will
3115 (presumably) be similar.
3116 See the INSTALL file for how this works.
3119 This variable is defined but not used by Configure.
3120 The value is a plain '' and is not useful.
3123 This variable is defined but not used by Configure.
3124 The value is a plain '' and is not useful.
3127 This variable holds the name of the directory below which the
3128 user will install the package. Usually, this is /usr/local, and
3129 executables go in /usr/local/bin, library stuff in /usr/local/lib,
3130 man pages in /usr/local/man, etc. It is only used to set defaults
3131 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
3133 prefixexp (prefix.U):
3134 This variable holds the full absolute path of the directory below
3135 which the user will install the package. Derived from prefix.
3137 privlib (privlib.U):
3138 This variable contains the eventual value of the PRIVLIB symbol,
3139 which is the name of the private library for this package. It may
3140 have a ~ on the front. It is up to the makefile to eventually create
3141 this directory while performing installation (with ~ substitution).
3143 privlibexp (privlib.U):
3144 This variable is the ~name expanded version of privlib, so that you
3145 may use it directly in Makefiles or shell scripts.
3147 prototype (prototype.U):
3148 This variable holds the eventual value of CAN_PROTOTYPE, which
3149 indicates the C compiler can handle funciton prototypes.
3151 ptrsize (ptrsize.U):
3152 This variable contains the value of the PTRSIZE symbol, which
3153 indicates to the C program how many bytes there are in a pointer.
3155 quadkind (quadtype.U):
3156 This variable, if defined, encodes the type of a quad:
3157 1 = int, 2 = long, 3 = long long, 4 = int64_t.
3159 quadtype (quadtype.U):
3160 This variable defines Quad_t to be something like long, int,
3161 long long, int64_t, or whatever type is used for 64-bit integers.
3163 randbits (randfunc.U):
3164 Indicates how many bits are produced by the function used to
3165 generate normalized random numbers.
3167 randfunc (randfunc.U):
3168 Indicates the name of the random number function to use.
3169 Values include drand48, random, and rand. In C programs,
3170 the 'Drand01' macro is defined to generate uniformly distributed
3171 random numbers over the range [0., 1.[ (see drand01 and nrand).
3173 randseedtype (randfunc.U):
3174 Indicates the type of the argument of the seedfunc.
3176 ranlib (orderlib.U):
3177 This variable is set to the pathname of the ranlib program, if it is
3178 needed to generate random libraries. Set to ":" if ar can generate
3179 random libraries or if random libraries are not supported
3181 rd_nodata (nblock_io.U):
3182 This variable holds the return code from read() when no data is
3183 present. It should be -1, but some systems return 0 when O_NDELAY is
3184 used, which is a shame because you cannot make the difference between
3185 no data and an EOF.. Sigh!
3187 revision (patchlevel.U):
3188 The value of revision comes from the patchlevel.h file.
3189 In a version number such as 5.6.1, this is the "5".
3190 In patchlevel.h, this is referred to as "PERL_REVISION".
3193 This variable is used internally by Configure to determine the
3194 full pathname (if any) of the rm program. After Configure runs,
3195 the value is reset to a plain "rm" and is not useful.
3198 This variable is defined but not used by Configure.
3199 The value is a plain '' and is not useful.
3202 This variable contains the command used by Configure
3203 to copy and execute a cross-compiled executable in the
3204 target host. Useful and available only during Perl build.
3205 Empty string '' if not cross-compiling.
3208 This variable contains 'true' or 'false' depending whether the
3209 nm extraction should be performed or not, according to the value
3210 of usenm and the flags on the Configure command line.
3212 sched_yield (d_pthread_y.U):
3213 This variable defines the way to yield the execution
3214 of the current thread.
3216 scriptdir (scriptdir.U):
3217 This variable holds the name of the directory in which the user wants
3218 to put publicly scripts for the package in question. It is either
3219 the same directory as for binaries, or a special one that can be
3220 mounted across different architectures, like /usr/share. Programs
3221 must be prepared to deal with ~name expansion.
3223 scriptdirexp (scriptdir.U):
3224 This variable is the same as scriptdir, but is filename expanded
3225 at configuration time, for programs not wanting to bother with it.
3228 This variable is used internally by Configure to determine the
3229 full pathname (if any) of the sed program. After Configure runs,
3230 the value is reset to a plain "sed" and is not useful.
3232 seedfunc (randfunc.U):
3233 Indicates the random number generating seed function.
3234 Values include srand48, srandom, and srand.
3236 selectminbits (selectminbits.U):
3237 This variable holds the minimum number of bits operated by select.
3238 That is, if you do select(n, ...), how many bits at least will be
3239 cleared in the masks if some activity is detected. Usually this
3240 is either n or 32*ceil(n/32), especially many little-endians do
3241 the latter. This is only useful if you have select(), naturally.
3243 selecttype (selecttype.U):
3244 This variable holds the type used for the 2nd, 3rd, and 4th
3245 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3246 is defined, and 'int *' otherwise. This is only useful if you
3247 have select(), naturally.
3250 This variable is defined but not used by Configure.
3251 The value is a plain '' and is not useful.
3254 This variable contains the full pathname of the shell used
3255 on this system to execute Bourne shell scripts. Usually, this will be
3256 /bin/sh, though it's possible that some systems will have /bin/ksh,
3257 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3259 This unit comes before Options.U, so you can't set sh with a '-D'
3260 option, though you can override this (and startsh)
3261 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3264 This variable is defined but not used by Configure.
3265 The value is a plain '' and is not useful.
3267 sharpbang (spitshell.U):
3268 This variable contains the string #! if this system supports that
3271 shmattype (d_shmat.U):
3272 This symbol contains the type of pointer returned by shmat().
3273 It can be 'void *' or 'char *'.
3275 shortsize (intsize.U):
3276 This variable contains the value of the SHORTSIZE symbol which
3277 indicates to the C program how many bytes there are in a short.
3279 shrpenv (libperl.U):
3280 If the user builds a shared libperl.so, then we need to tell the
3281 'perl' executable where it will be able to find the installed libperl.so.
3282 One way to do this on some systems is to set the environment variable
3283 LD_RUN_PATH to the directory that will be the final location of the
3284 shared libperl.so. The makefile can use this with something like
3285 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3287 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3290 See the main perl Makefile.SH for actual working usage.
3291 Alternatively, we might be able to use a command line option such
3292 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3293 $archlibexp/CORE (Linux).
3295 shsharp (spitshell.U):
3296 This variable tells further Configure units whether your sh can
3299 sig_count (sig_name.U):
3300 This variable holds a number larger than the largest valid
3301 signal number. This is usually the same as the NSIG macro.
3303 sig_name (sig_name.U):
3304 This variable holds the signal names, space separated. The leading
3305 SIG in signal name is removed. A ZERO is prepended to the
3306 list. This is currently not used.
3308 sig_name_init (sig_name.U):
3309 This variable holds the signal names, enclosed in double quotes and
3310 separated by commas, suitable for use in the SIG_NAME definition
3311 below. A "ZERO" is prepended to the list, and the list is
3312 terminated with a plain 0. The leading SIG in signal names
3313 is removed. See sig_num.
3315 sig_num (sig_name.U):
3316 This variable holds the signal numbers, space separated. A ZERO is
3317 prepended to the list (corresponding to the fake SIGZERO), and
3318 the list is terminated with a 0. Those numbers correspond to
3319 the value of the signal listed in the same place within the
3322 sig_num_init (sig_name.U):
3323 This variable holds the signal numbers, enclosed in double quotes and
3324 separated by commas, suitable for use in the SIG_NUM definition
3325 below. A "ZERO" is prepended to the list, and the list is
3326 terminated with a plain 0.
3328 sig_size (sig_name.U):
3329 This variable contains the number of elements of the sig_name
3330 and sig_num arrays, excluding the final NULL entry.
3332 signal_t (d_voidsig.U):
3333 This variable holds the type of the signal handler (void or int).
3335 sitearch (sitearch.U):
3336 This variable contains the eventual value of the SITEARCH symbol,
3337 which is the name of the private library for this package. It may
3338 have a ~ on the front. It is up to the makefile to eventually create
3339 this directory while performing installation (with ~ substitution).
3340 The standard distribution will put nothing in this directory.
3341 After perl has been installed, users may install their own local
3342 architecture-dependent modules in this directory with
3343 MakeMaker Makefile.PL
3344 or equivalent. See INSTALL for details.
3346 sitearchexp (sitearch.U):
3347 This variable is the ~name expanded version of sitearch, so that you
3348 may use it directly in Makefiles or shell scripts.
3350 sitebin (sitebin.U):
3351 This variable holds the name of the directory in which the user wants
3352 to put add-on publicly executable files for the package in question. It
3353 is most often a local directory such as /usr/local/bin. Programs using
3354 this variable must be prepared to deal with ~name substitution.
3355 The standard distribution will put nothing in this directory.
3356 After perl has been installed, users may install their own local
3357 executables in this directory with
3358 MakeMaker Makefile.PL
3359 or equivalent. See INSTALL for details.
3361 sitebinexp (sitebin.U):
3362 This is the same as the sitebin variable, but is filename expanded at
3363 configuration time, for use in your makefiles.
3365 sitelib (sitelib.U):
3366 This variable contains the eventual value of the SITELIB symbol,
3367 which is the name of the private library for this package. It may
3368 have a ~ on the front. It is up to the makefile to eventually create
3369 this directory while performing installation (with ~ substitution).
3370 The standard distribution will put nothing in this directory.
3371 After perl has been installed, users may install their own local
3372 architecture-independent modules in this directory with
3373 MakeMaker Makefile.PL
3374 or equivalent. See INSTALL for details.
3376 sitelib_stem (sitelib.U):
3377 This variable is $sitelibexp with any trailing version-specific component
3378 removed. The elements in inc_version_list (inc_version_list.U) can
3379 be tacked onto this variable to generate a list of directories to search.
3381 sitelibexp (sitelib.U):
3382 This variable is the ~name expanded version of sitelib, so that you
3383 may use it directly in Makefiles or shell scripts.
3385 siteprefix (siteprefix.U):
3386 This variable holds the full absolute path of the directory below
3387 which the user will install add-on packages.
3388 See INSTALL for usage and examples.
3390 siteprefixexp (siteprefix.U):
3391 This variable holds the full absolute path of the directory below
3392 which the user will install add-on packages. Derived from siteprefix.
3394 sizesize (sizesize.U):
3395 This variable contains the size of a sizetype in bytes.
3397 sizetype (sizetype.U):
3398 This variable defines sizetype to be something like size_t,
3399 unsigned long, or whatever type is used to declare length
3400 parameters for string functions.
3403 This variable is defined but not used by Configure.
3404 The value is a plain '' and is not useful.
3407 This variable is defined but not used by Configure.
3408 The value is a plain '' and is not useful.
3411 This variable holds the extension used to identify shared libraries
3412 (also known as shared objects) on the system. Usually set to 'so'.
3414 sockethdr (d_socket.U):
3415 This variable has any cpp '-I' flags needed for socket support.
3417 socketlib (d_socket.U):
3418 This variable has the names of any libraries needed for socket support.
3420 socksizetype (socksizetype.U):
3421 This variable holds the type used for the size argument
3422 for various socket calls like accept. Usual values include
3423 socklen_t, size_t, and int.
3426 This variable is used internally by Configure to determine the
3427 full pathname (if any) of the sort program. After Configure runs,
3428 the value is reset to a plain "sort" and is not useful.
3430 spackage (package.U):
3431 This variable contains the name of the package being constructed,
3432 with the first letter uppercased, i.e. suitable for starting
3435 spitshell (spitshell.U):
3436 This variable contains the command necessary to spit out a runnable
3437 shell on this system. It is either cat or a grep '-v' for # comments.
3439 sPRId64 (quadfio.U):
3440 This variable, if defined, contains the string used by stdio to
3441 format 64-bit decimal numbers (format 'd') for output.
3443 sPRIeldbl (longdblfio.U):
3444 This variable, if defined, contains the string used by stdio to
3445 format long doubles (format 'e') for output.
3447 sPRIEUldbl (longdblfio.U):
3448 This variable, if defined, contains the string used by stdio to
3449 format long doubles (format 'E') for output.
3450 The 'U' in the name is to separate this from sPRIeldbl so that even
3451 case-blind systems can see the difference.
3453 sPRIfldbl (longdblfio.U):
3454 This variable, if defined, contains the string used by stdio to
3455 format long doubles (format 'f') for output.
3457 sPRIFUldbl (longdblfio.U):
3458 This variable, if defined, contains the string used by stdio to
3459 format long doubles (format 'F') for output.
3460 The 'U' in the name is to separate this from sPRIfldbl so that even
3461 case-blind systems can see the difference.
3463 sPRIgldbl (longdblfio.U):
3464 This variable, if defined, contains the string used by stdio to
3465 format long doubles (format 'g') for output.
3467 sPRIGUldbl (longdblfio.U):
3468 This variable, if defined, contains the string used by stdio to
3469 format long doubles (format 'G') for output.
3470 The 'U' in the name is to separate this from sPRIgldbl so that even
3471 case-blind systems can see the difference.
3473 sPRIi64 (quadfio.U):
3474 This variable, if defined, contains the string used by stdio to
3475 format 64-bit decimal numbers (format 'i') for output.
3477 sPRIo64 (quadfio.U):
3478 This variable, if defined, contains the string used by stdio to
3479 format 64-bit octal numbers (format 'o') for output.
3481 sPRIu64 (quadfio.U):
3482 This variable, if defined, contains the string used by stdio to
3483 format 64-bit unsigned decimal numbers (format 'u') for output.
3485 sPRIx64 (quadfio.U):
3486 This variable, if defined, contains the string used by stdio to
3487 format 64-bit hexadecimal numbers (format 'x') for output.
3489 sPRIXU64 (quadfio.U):
3490 This variable, if defined, contains the string used by stdio to
3491 format 64-bit hExADECimAl numbers (format 'X') for output.
3492 The 'U' in the name is to separate this from sPRIx64 so that even
3493 case-blind systems can see the difference.
3496 This variable holds the path to the package source. It is up to
3497 the Makefile to use this variable and set VPATH accordingly to
3498 find the sources remotely.
3500 sSCNfldbl (longdblfio.U):
3501 This variable, if defined, contains the string used by stdio to
3502 format long doubles (format 'f') for input.
3504 ssizetype (ssizetype.U):
3505 This variable defines ssizetype to be something like ssize_t,
3506 long or int. It is used by functions that return a count
3507 of bytes or an error condition. It must be a signed type.
3508 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3510 startperl (startperl.U):
3511 This variable contains the string to put on the front of a perl
3512 script to make sure (hopefully) that it runs with perl and not some
3513 shell. Of course, that leading line must be followed by the classical
3515 eval 'exec perl -S $0 ${1+"$@"}'
3516 if $running_under_some_shell;
3517 to guarantee perl startup should the shell execute the script. Note
3518 that this magic incatation is not understood by csh.
3520 startsh (startsh.U):
3521 This variable contains the string to put on the front of a shell
3522 script to make sure (hopefully) that it runs with sh and not some
3525 static_ext (Extensions.U):
3526 This variable holds a list of XS extension files we want to
3527 link statically into the package. It is used by Makefile.
3529 stdchar (stdchar.U):
3530 This variable conditionally defines STDCHAR to be the type of char
3531 used in stdio.h. It has the values "unsigned char" or "char".
3533 stdio_base (d_stdstdio.U):
3534 This variable defines how, given a FILE pointer, fp, to access the
3535 _base field (or equivalent) of stdio.h's FILE structure. This will
3536 be used to define the macro FILE_base(fp).
3538 stdio_bufsiz (d_stdstdio.U):
3539 This variable defines how, given a FILE pointer, fp, to determine
3540 the number of bytes store in the I/O buffer pointer to by the
3541 _base field (or equivalent) of stdio.h's FILE structure. This will
3542 be used to define the macro FILE_bufsiz(fp).
3544 stdio_cnt (d_stdstdio.U):
3545 This variable defines how, given a FILE pointer, fp, to access the
3546 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3547 be used to define the macro FILE_cnt(fp).
3549 stdio_filbuf (d_stdstdio.U):
3550 This variable defines how, given a FILE pointer, fp, to tell
3551 stdio to refill it's internal buffers (?). This will
3552 be used to define the macro FILE_filbuf(fp).
3554 stdio_ptr (d_stdstdio.U):
3555 This variable defines how, given a FILE pointer, fp, to access the
3556 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3557 be used to define the macro FILE_ptr(fp).
3559 stdio_stream_array (stdio_streams.U):
3560 This variable tells the name of the array holding the stdio streams.
3561 Usual values include _iob, __iob, and __sF.
3563 strings (i_string.U):
3564 This variable holds the full path of the string header that will be
3565 used. Typically /usr/include/string.h or /usr/include/strings.h.
3568 This variable is defined but not used by Configure.
3569 The value is a plain '' and is not useful.
3571 subversion (patchlevel.U):
3572 The subversion level of this package.
3573 The value of subversion comes from the patchlevel.h file.
3574 In a version number such as 5.6.1, this is the "1".
3575 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3576 This is unique to perl.
3579 This variable holds the place where the manual is located on this
3580 system. It is not the place where the user wants to put his manual
3581 pages. Rather it is the place where Configure may look to find manual
3582 for unix commands (section 1 of the manual usually). See mansrc.
3585 This variable is defined but not used by Configure.
3586 The value is a plain '' and is not useful.
3589 This variable is defined but not used by Configure.
3590 The value is a plain '' and is not useful.
3592 targetarch (Cross.U):
3593 If cross-compiling, this variable contains the target architecture.
3594 If not, this will be empty.
3597 This variable is defined but not used by Configure.
3598 The value is a plain '' and is not useful.
3601 This variable is defined but not used by Configure.
3602 The value is a plain '' and is not useful.
3605 This variable is used internally by Configure to determine the
3606 full pathname (if any) of the test program. After Configure runs,
3607 the value is reset to a plain "test" and is not useful.
3609 timeincl (i_time.U):
3610 This variable holds the full path of the included time header(s).
3612 timetype (d_time.U):
3613 This variable holds the type returned by time(). It can be long,
3614 or time_t on BSD sites (in which case <sys/types.h> should be
3615 included). Anyway, the type Time_t should be used.
3618 This variable contains the command used by Configure
3619 to copy to from the target host. Useful and available
3620 only during Perl build.
3621 The string ':' if not cross-compiling.
3624 This variable is used internally by Configure to determine the
3625 full pathname (if any) of the touch program. After Configure runs,
3626 the value is reset to a plain "touch" and is not useful.
3629 This variable is used internally by Configure to determine the
3630 full pathname (if any) of the tr program. After Configure runs,
3631 the value is reset to a plain "tr" and is not useful.
3634 This variable contains the value to be passed to the tr(1)
3635 command to transliterate a newline. Typical values are
3636 '\012' and '\n'. This is needed for EBCDIC systems where
3637 newline is not necessarily '\012'.
3640 This variable is defined but not used by Configure.
3641 The value is a plain '' and is not useful.
3644 This variable is the size of an U16 in bytes.
3647 This variable contains the C type used for Perl's U16.
3650 This variable is the size of an U32 in bytes.
3653 This variable contains the C type used for Perl's U32.
3656 This variable is the size of an U64 in bytes.
3659 This variable contains the C type used for Perl's U64.
3662 This variable is the size of an U8 in bytes.
3665 This variable contains the C type used for Perl's U8.
3668 This variable contains the format string used for printing a Uid_t.
3670 uidsign (uidsign.U):
3671 This variable contains the signedness of a uidtype.
3672 1 for unsigned, -1 for signed.
3674 uidsize (uidsize.U):
3675 This variable contains the size of a uidtype in bytes.
3677 uidtype (uidtype.U):
3678 This variable defines Uid_t to be something like uid_t, int,
3679 ushort, or whatever type is used to declare user ids in the kernel.
3682 This variable is used internally by Configure to determine the
3683 full pathname (if any) of the uname program. After Configure runs,
3684 the value is reset to a plain "uname" and is not useful.
3687 This variable is used internally by Configure to determine the
3688 full pathname (if any) of the uniq program. After Configure runs,
3689 the value is reset to a plain "uniq" and is not useful.
3691 uquadtype (quadtype.U):
3692 This variable defines Uquad_t to be something like unsigned long,
3693 unsigned int, unsigned long long, uint64_t, or whatever type is
3694 used for 64-bit integers.
3696 use5005threads (usethreads.U):
3697 This variable conditionally defines the USE_5005THREADS symbol,
3698 and indicates that Perl should be built to use the 5.005-based
3699 threading implementation.
3701 use64bitall (use64bits.U):
3702 This variable conditionally defines the USE_64_BIT_ALL symbol,
3703 and indicates that 64-bit integer types should be used
3704 when available. The maximal possible
3705 64-bitness is employed: LP64 or ILP64, meaning that you will
3706 be able to use more than 2 gigabytes of memory. This mode is
3707 even more binary incompatible than USE_64_BIT_INT. You may not
3708 be able to run the resulting executable in a 32-bit CPU at all or
3709 you may need at least to reboot your OS to 64-bit mode.
3711 use64bitint (use64bits.U):
3712 This variable conditionally defines the USE_64_BIT_INT symbol,
3713 and indicates that 64-bit integer types should be used
3714 when available. The minimal possible 64-bitness
3715 is employed, just enough to get 64-bit integers into Perl.
3716 This may mean using for example "long longs", while your memory
3717 may still be limited to 2 gigabytes.
3719 usecrosscompile (Cross.U):
3720 This variable conditionally defines the USE_CROSS_COMPILE symbol,
3721 and indicates that Perl has been cross-compiled.
3724 This variable indicates if the system supports dynamic
3725 loading of some sort. See also dlsrc and dlobj.
3727 useithreads (usethreads.U):
3728 This variable conditionally defines the USE_ITHREADS symbol,
3729 and indicates that Perl should be built to use the interpreter-based
3730 threading implementation.
3732 uselargefiles (uselfs.U):
3733 This variable conditionally defines the USE_LARGE_FILES symbol,
3734 and indicates that large file interfaces should be used when
3737 uselongdouble (uselongdbl.U):
3738 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3739 and indicates that long doubles should be used when available.
3741 usemorebits (usemorebits.U):
3742 This variable conditionally defines the USE_MORE_BITS symbol,
3743 and indicates that explicit 64-bit interfaces and long doubles
3744 should be used when available.
3746 usemultiplicity (usemultiplicity.U):
3747 This variable conditionally defines the MULTIPLICITY symbol,
3748 and indicates that Perl should be built to use multiplicity.
3750 usemymalloc (mallocsrc.U):
3751 This variable contains y if the malloc that comes with this package
3752 is desired over the system's version of malloc. People often include
3753 special versions of malloc for effiency, but such versions are often
3754 less portable. See also mallocsrc and mallocobj.
3755 If this is 'y', then -lmalloc is removed from $libs.
3758 This variable contains 'true' or 'false' depending whether the
3759 nm extraction is wanted or not.
3761 useopcode (Extensions.U):
3762 This variable holds either 'true' or 'false' to indicate
3763 whether the Opcode extension should be used. The sole
3764 use for this currently is to allow an easy mechanism
3765 for users to skip the Opcode extension from the Configure
3768 useperlio (useperlio.U):
3769 This variable conditionally defines the USE_PERLIO symbol,
3770 and indicates that the PerlIO abstraction should be
3773 useposix (Extensions.U):
3774 This variable holds either 'true' or 'false' to indicate
3775 whether the POSIX extension should be used. The sole
3776 use for this currently is to allow an easy mechanism
3777 for hints files to indicate that POSIX will not compile
3778 on a particular system.
3780 usereentrant (usethreads.U):
3781 This variable conditionally defines the USE_REENTRANT_API symbol,
3782 which indicates that the thread code may try to use the various
3783 _r versions of library functions. This is only potentially
3784 meaningful if usethreads is set and is very experimental, it is
3785 not even prompted for.
3788 This variable is set to true when the user agrees to use sfio.
3789 It is set to false when sfio is not available or when the user
3790 explicitely requests not to use sfio. It is here primarily so
3791 that command-line settings can override the auto-detection of
3792 d_sfio without running into a "WHOA THERE".
3794 useshrplib (libperl.U):
3795 This variable is set to 'yes' if the user wishes
3796 to build a shared libperl, and 'no' otherwise.
3798 usesocks (usesocks.U):
3799 This variable conditionally defines the USE_SOCKS symbol,
3800 and indicates that Perl should be built to use SOCKS.
3802 usethreads (usethreads.U):
3803 This variable conditionally defines the USE_THREADS symbol,
3804 and indicates that Perl should be built to use threads.
3806 usevendorprefix (vendorprefix.U):
3807 This variable tells whether the vendorprefix
3808 and consequently other vendor* paths are in use.
3810 usevfork (d_vfork.U):
3811 This variable is set to true when the user accepts to use vfork.
3812 It is set to false when no vfork is available or when the user
3813 explicitely requests not to use vfork.
3816 This variable holds the path of the include files, which is
3817 usually /usr/include. It is mainly used by other Configure units.
3820 This variable is defined but not used by Configure.
3821 The value is a plain '' and is not useful.
3823 uvoformat (perlxvf.U):
3824 This variable contains the format string used for printing
3825 a Perl UV as an unsigned octal integer.
3828 This variable is the size of a UV in bytes.
3831 This variable contains the C type used for Perl's UV.
3833 uvuformat (perlxvf.U):
3834 This variable contains the format string used for printing
3835 a Perl UV as an unsigned decimal integer.
3837 uvxformat (perlxvf.U):
3838 This variable contains the format string used for printing
3839 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3841 uvXUformat (perlxvf.U):
3842 This variable contains the format string used for printing
3843 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3845 vendorarch (vendorarch.U):
3846 This variable contains the value of the PERL_VENDORARCH symbol.
3847 It may have a ~ on the front.
3848 The standard distribution will put nothing in this directory.
3849 Vendors who distribute perl may wish to place their own
3850 architecture-dependent modules and extensions in this directory with
3851 MakeMaker Makefile.PL INSTALLDIRS=vendor
3852 or equivalent. See INSTALL for details.
3854 vendorarchexp (vendorarch.U):
3855 This variable is the ~name expanded version of vendorarch, so that you
3856 may use it directly in Makefiles or shell scripts.
3858 vendorbin (vendorbin.U):
3859 This variable contains the eventual value of the VENDORBIN symbol.
3860 It may have a ~ on the front.
3861 The standard distribution will put nothing in this directory.
3862 Vendors who distribute perl may wish to place additional
3863 binaries in this directory with
3864 MakeMaker Makefile.PL INSTALLDIRS=vendor
3865 or equivalent. See INSTALL for details.
3867 vendorbinexp (vendorbin.U):
3868 This variable is the ~name expanded version of vendorbin, so that you
3869 may use it directly in Makefiles or shell scripts.
3871 vendorlib (vendorlib.U):
3872 This variable contains the eventual value of the VENDORLIB symbol,
3873 which is the name of the private library for this package.
3874 The standard distribution will put nothing in this directory.
3875 Vendors who distribute perl may wish to place their own
3876 modules in this directory with
3877 MakeMaker Makefile.PL INSTALLDIRS=vendor
3878 or equivalent. See INSTALL for details.
3880 vendorlib_stem (vendorlib.U):
3881 This variable is $vendorlibexp with any trailing version-specific component
3882 removed. The elements in inc_version_list (inc_version_list.U) can
3883 be tacked onto this variable to generate a list of directories to search.
3885 vendorlibexp (vendorlib.U):
3886 This variable is the ~name expanded version of vendorlib, so that you
3887 may use it directly in Makefiles or shell scripts.
3889 vendorprefix (vendorprefix.U):
3890 This variable holds the full absolute path of the directory below
3891 which the vendor will install add-on packages.
3892 See INSTALL for usage and examples.
3894 vendorprefixexp (vendorprefix.U):
3895 This variable holds the full absolute path of the directory below
3896 which the vendor will install add-on packages. Derived from vendorprefix.
3898 version (patchlevel.U):
3899 The full version number of this package, such as 5.6.1 (or 5_6_1).
3900 This combines revision, patchlevel, and subversion to get the
3901 full version number, including any possible subversions.
3902 This is suitable for use as a directory name, and hence is
3903 filesystem dependent.
3905 versiononly (versiononly.U):
3906 If set, this symbol indicates that only the version-specific
3907 components of a perl installation should be installed.
3908 This may be useful for making a test installation of a new
3909 version without disturbing the existing installation.
3910 Setting versiononly is equivalent to setting installperl's -v option.
3911 In particular, the non-versioned scripts and programs such as
3912 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3913 (see INSTALL for a more complete list). Nor are the man
3915 Usually, this is undef.
3918 This variable is defined but not used by Configure.
3919 The value is a plain '' and is not useful.
3921 voidflags (voidflags.U):
3922 This variable contains the eventual value of the VOIDFLAGS symbol,
3923 which indicates how much support of the void type is given by this
3924 compiler. See VOIDFLAGS for more info.
3927 This variable holds extra path (space-separated) used to find
3928 libraries on this platform, for example CPU-specific libraries
3929 (on multi-CPU platforms) may be listed here.
3931 xs_apiversion (xs_apiversion.U):
3932 This variable contains the version of the oldest perl binary
3933 compatible with the present perl. perl.c:incpush() and
3934 lib/lib.pm will automatically search in $sitearch for older
3935 directories across major versions back to xs_apiversion.
3936 This is only useful if you have a perl library directory tree
3937 structured like the default one.
3938 See INSTALL for how this works.
3939 The versioned site_perl directory was introduced in 5.005,
3940 so that is the lowest possible value.
3941 Since this can depend on compile time options (such as
3942 bincompat) it is set by Configure. Other non-default sources
3943 of potential incompatibility, such as multiplicity, threads,
3944 debugging, 64bits, sfio, etc., are not checked for currently,
3945 though in principle we could go snooping around in old
3949 This variable holds the name of the compiler compiler we
3950 want to use in the Makefile. It can be yacc, byacc, or bison -y.
3953 This variable contains any additional yacc flags desired by the
3954 user. It is up to the Makefile to use this.
3957 This variable is defined but not used by Configure.
3958 The value is a plain '' and is not useful.
3961 This variable is used internally by Configure to determine the
3962 full pathname (if any) of the zip program. After Configure runs,
3963 the value is reset to a plain "zip" and is not useful.